CURT Electrical Adapter 4-Way Flat Vehicle to 5-Way Flat Trailer 57187 - The Home Depot
Amazon.com: Oyviny 5 Way Flat Trailer Wiring Harness Plug with 22 inch Wire Lead Trailer End Durable 5 Pin Male Connector Trailer Light Wiring Harness Extension for Trailer RV Boat Color-Coded Waterproof :
CURT 4-Way Flat Connector Plug with 12" Wires (Trailer Side) 58030 - The Home Depot
CURT Electrical Adapter (7-Way RV Blade Vehicle to 5-Way Flat Trailer) 57250 - The Home Depot