Amazon.com: OPT7 7 Pin to 4 Pin Trailer Adapter with Secure Tab, 7 Way Blade to 4 Way Flat Trailer Light Adapter, Connector for Trailer Tow Hitch and Redline LED Tailgate Light Bar : Automotive
Reese Connector 7 Way Plastic Trailer End in the Trailer Parts & Accessories department at Lowes.com