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A plug assembly for a vehicle-trailer wiring connector assembly includes a plug housing, six connector cavities, and a first and second electrical connectors. The plug housing is positionable in a receptacle assembly. The six connector cavities are defined in and radially disposed around a connectin

A plug assembly for a vehicle-trailer wiring connector assembly includes a plug housing, six connector cavities, and a first and second electrical connectors. The plug housing is positionable in a receptacle assembly. The six connector cavities are defined in and radially disposed around a connecting face of the plug housing in compliance with the Society of Automotive Engineers J2863 standard. The first electrical connector is positioned with respect to a first connector cavity of the cavities. A first contact surface of the first electrical connector is contactable within the first connector cavity. The second electrical connector is positioned with respect to the plug housing. A second contact surface of the second electrical connector is substantially aligned with an outer surface of the plug housing and externally contactable. The second electrical connector is positioned relative to the first electrical connector such that the second electrical connector is electrically insulated therefrom.

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1. A plug assembly for a vehicle-trailer wiring connector assembly, the plug assembly comprising: a plug housing that is configured to be positioned in a receptacle assembly;six connector cavities that are defined in the plug housing and that are radially disposed around a connecting face of the plu

1. A plug assembly for a vehicle-trailer wiring connector assembly, the plug assembly comprising: a plug housing that is configured to be positioned in a receptacle assembly;six connector cavities that are defined in the plug housing and that are radially disposed around a connecting face of the plug housing in an arrangement in compliance with the Society of Automotive Engineers (“SAE”) J2863 standard;a first electrical connector disposed and positioned with respect to a first connector cavity of the six connector cavities such that a first contact surface of the first electrical connector is contactable within the first connector cavity; anda second electrical connector disposed and positioned with respect to the plug housing such that a second contact surface of the second electrical connector is substantially aligned with an outer surface of the plug housing and externally contactable and such that the second electrical connector is positioned relative to the first electrical connector in a manner in which the second electrical connector is electrically insulated from the first electrical connector. 2. The plug assembly of claim 1, wherein at least a portion of the second electrical connector is disposed and positioned on a circumferential edge between the connecting face and a circumferential surface of the plug housing. 3. The plug assembly of claim 1, wherein: at least a portion of the second contact surface of the second electrical connector is substantially aligned with the connecting face; andthe first electrical connector and the second electrical connector are disposed such that the first contact surface and at least a portion of the second contact surface are substantially perpendicular to each other. 4. The plug assembly of claim 1, wherein: at least a portion of the second contact surface of the second electrical connector is substantially aligned with a circumferential surface of the plug housing; andthe first electrical connector and the second electrical connector are disposed such that the first contact surface and at least a portion of the second contact surface are substantially parallel to each other. 5. The plug assembly of claim 1, further comprising a third electrical connector disposed and positioned with respect to the plug housing such that: a third contact surface of the third electrical connector is substantially aligned with the outer surface of the plug housing and externally contactable, andthe third electrical connector is positioned relative to the first electrical connector and the second electrical connector in a manner in which the third electrical connector is electrically insulated from the first electrical connector and the second electrical connector. 6. The plug assembly of claim 5, wherein: the third electrical connector and the second electrical connector are radially displaced from the first electrical connector;the third electrical connector is circumferentially displaced from the second electrical connector; andthe third electrical connector and the second electrical connector are positioned within a circumferential portion of the connecting face occupied by the first electrical connector. 7. The plug assembly of claim 1, wherein the first electrical connector and the second electrical connector are separated by material of the plug housing. 8. The plug assembly of claim 1, wherein the first electrical connector is positioned between the second electrical connector and a central axis of the plug housing. 9. The plug assembly of claim 1, wherein: the first electrical connector is disposed and positioned with respect to the first connector cavity in compliance with the SAE J2863 standard; andthe six connector cavities are sized in compliance with the SAE J2863 standard. 10. The plug assembly of claim 1, wherein: the first electrical connector is one of six first electrical connectors;each of the six first electrical connectors is disposed and positioned with respect to a separate one of the six connector cavities in accordance with the SAE J2863 standard;the second electrical connector is one of a plurality of second electrical connectors that each have a second contact surface; andeach of the plurality of second electrical connectors is disposed and positioned with respect to the plug housing such that the second contact surface of each of the plurality of second electrical connectors is substantially aligned with an outer surface of the plug housing and externally contactable and such that each of the plurality of second electrical connectors is positioned relative to one of the six first electrical connectors in a manner in which each of the plurality of second electrical connectors is electrically insulated from the six first electrical connectors and each other of the plurality of second electrical connectors. 11. The plug assembly of claim 10, further comprising a plurality of third electrical connectors that each have a third contact surface, wherein each of the plurality of third electrical connectors is disposed and positioned with respect to a separate one of the six connector cavities such that its corresponding third contact surface is contactable within the corresponding connector cavity and such that the corresponding third electrical connector is displaced relative to the first electrical connector that corresponds to the corresponding connector cavity in a manner in which the corresponding third electrical connector is electrically insulated from the first electrical connector that corresponds to the corresponding connector cavity. 12. A vehicle-trailer wiring connector assembly (connector assembly) comprising: a receptacle assembly; anda plug assembly including: a plug housing that is configured to be positioned in the receptacle assembly;six connector cavities that are defined in the plug housing and that are radially disposed around a connecting face of the plug housing in accordance with the Society of Automotive Engineers (“SAE”) J2863 standard;a first electrical connector disposed and positioned with respect to a first connector cavity of the six connector cavities such that a first contact surface of the first electrical connector is contactable within the first connector cavity;a second electrical connector disposed and positioned with respect to a second connector cavity of the six connector cavities such that a second contact surface of the second electrical connector is contactable within the second connector cavity;a third electrical connector disposed and positioned with respect to a third connector cavity of the six connector cavities such that a third contact surface of the third electrical connector is contactable within the third connector cavity;a fourth electrical connector disposed and positioned with respect to a fourth connector cavity of the six connector cavities such that a fourth contact surface of the fourth electrical connector is contactable within the fourth connector cavity;a fifth electrical connector disposed and positioned with respect to a fifth connector cavity of the six connector cavities such that a fifth contact surface of the fifth electrical connector is contactable within the fifth connector cavity;a sixth electrical connector disposed and positioned with respect to a sixth connector cavity of the six connector cavities such that a sixth contact surface of the sixth electrical connector is contactable within the sixth connector cavity; anda seventh electrical connector disposed and positioned with respect to the plug housing such that a seventh contact surface of the seventh electrical connector is substantially aligned with an outer surface of the plug housing and externally contactable and such that the seventh electrical connector is positioned relative to the first electrical connector in a manner in which the second electrical connector is electrically insulated from the first electrical connector. 13. The connector assembly of claim 12, wherein at least a portion of the seventh contact surface of the seventh electrical connector is substantially aligned with the connecting face of the plug housing and/or substantially aligned with a circumferential surface of the plug housing. 14. The connector assembly of claim 12, wherein the plug assembly further includes an eighth electrical connector that is disposed and positioned with respect to the plug housing such that: an eighth contact surface of the eighth electrical connector is substantially aligned with the outer surface of the plug housing and externally contactable, andthe eighth electrical connector is positioned relative to the first electrical connector and the seventh electrical connector in a manner in which the eighth electrical connector is electrically insulated from the first electrical connector and the seventh electrical connector. 15. The connector assembly of claim 14, wherein: the eighth electrical connector and the seventh electrical connector are radially displaced from the first electrical connector;the eighth electrical connector is circumferentially displaced from the seventh electrical connector; andthe eighth electrical connector and the seventh electrical connector are positioned within a circumferential portion of the connecting face occupied by the first electrical connector. 16. The connector assembly of claim 15, wherein: the first electrical connector is separated from the seventh electrical connector and the eighth electrical connector by material of the plug housing;the seventh electrical connector is separated from the eighth electrical connector by material of the plug housing; andthe first electrical connector is positioned between the seventh electrical connector and a central axis of the plug housing. 17. The connector assembly of claim 12, wherein the receptacle assembly includes: a receptacle housing that includes a first cavity, the first cavity extending from a first end of the receptacle housing to a central structure of the receptacle housing;a housing opening defined at the first end, wherein at least a portion of the first cavity and at least a portion of the housing opening is sized and shaped to enable insertion of the plug assembly;a first receptacle connector with a first portion that extends from the central structure into the first cavity, wherein the first receptacle connector is sized such that the first receptacle connector is configured to be inserted into one of the six connector cavities of the plug assembly; anda second receptacle connector that includes a second portion that is disposed and positioned at least partially on an interior surface of the first cavity and contactable within the first cavity, wherein the second receptacle connector is electrically insulated from the first receptacle connector. 18. The connector assembly of claim 17, wherein the second portion of the second receptacle connector includes: a first section that is disposed and positioned on a portion of the interior surface of the first cavity located at the central structure;a second section that is disposed and positioned on a portion of an interior radial surface of the first cavity; anda third section that is disposed and positioned on an interior circumferential surface of the first cavity immediately adjacent to the interior radial surface. 19. The connector assembly of claim 18, wherein the second receptacle connector includes an angled tab that extends from the interior circumferential surface towards a central axis of the receptacle housing. 20. The connector assembly of claim 17, wherein: the receptacle assembly further includes a third receptacle connector that includes a third portion that is disposed and positioned at least partially on the interior surface of the first cavity and contactable within the first cavity; andthe third receptacle connector is electrically insulated from the first receptacle connector and the second receptacle connector. 21. The connector assembly of claim 20, wherein a third receptacle connector is disposed and positioned with respect to the plug housing such that: the third receptacle connector and the second receptacle connector are radially displaced from the first receptacle connector;the third receptacle connector is circumferentially displaced from the second receptacle connector; andthe third receptacle connector and the second receptacle connector are positioned within a circumferential portion of the interior surface of the first cavity occupied by the first receptacle connector. 22. The connector assembly of claim 12, wherein: the first electrical connector is disposed and positioned with respect to the first connector cavity in compliance with the SAE J2863 standard;the second electrical connector is disposed and positioned with respect to the second connector cavity in compliance with the SAE J2863 standard;the third electrical connector is disposed and positioned with respect to the third connector cavity in compliance with the SAE J2863 standard;the fourth electrical connector is disposed and positioned with respect to the fourth connector cavity in compliance with the SAE J2863 standard;the fifth electrical connector is disposed and positioned with respect to the fifth connector cavity in compliance with the SAE J2863 standard;the sixth electrical connector is disposed and positioned with respect to the sixth connector cavity in compliance with the SAE J2863 standard;the six connector cavities are sized in compliance with the SAE J2863 standard; andthe seventh electrical connector is configured to communicate a signal outside of the SAE J2863 standard. 23. The connector assembly of claim 12, further comprising an eighth electrical connector disposed and positioned with respect to the first connector cavity such that an eighth contact surface of the eighth electrical connector is contactable within the first connector cavity and such that the eighth electrical connector is displaced relative to the first electrical connector in a manner in which the eighth electrical connector is electrically insulated from the first electrical connector.