Amazon.com: APEXEDC 7 Way Round to 4 Way Pin Flat Trailer Coiled Wiring Harness Connector Adapter Plug,7 Pin to 4 Pin Trailer Vehicle Adapter for RV Camper Hitch Towing(3ft) : Automotive
Amazon.com: RED WOLF 7 Way Round to 4 Way Flat Trailer Coiled Wiring Harness Connector Adapter Plug Converter Camper Hitch Towing Vehicle-Side 7 Pin Round to 4 Pin Wiring Harness 50 Inch Cord : Automotive