7 round plug but only 6 wires from trailer | PopUpPortal
Dr Infrared Heater 6 ft. 7-Way Trailer Plug Cord Wiring Harness, Heavy-Duty Weatherproof, Corrosion Resistant Inline Cable, for RV, Campers DR-RV106 - The Home Depot
Wesbar Boat Trailer Light Plug | 6 Pin 36 Inch
Trailer Wiring Diagrams - Johnson Trailer Co.
Jacketed Trailer Wire, 4-way, 6-way, and 7-way, 100 Ft. Spools