Hopkins Plug In Simple (TM) 6-Round & 4-Flat Trailer Wiring Connector Adapter 47325 19-0863

6 Pole round to 4-wire flat plug-in simple! Adapters take the guesswork out of vehicle-to-trailer wiring. Pre-wired adapters allow the consumer to create a custom wiring system appropriate for any towing situation. It has built-in LED to verify wiring is correct. Includes a dust cover.