Reese Insta-Plug Kit 4 Wire Flat in the Trailer Parts & Accessories department at Lowes.com
Amazon.com: DOAUTO 29Ft 4 Way 4-Pin Flat Trailer Wiring Harness Extension Kit with Dual White Ground Wire, 25' Male & 4' Female Wishbone 18 Gauge Connector with Full Terminal SAE J1128 with