Hopkins Plug In Simple (TM) 7-Blade To 6-Round Trailer Wiring Connector Adapter 47525 19-0872

Pre-wired adapters allow the consumer to create a custom wiring system appropriate for any towing situation. Features built-in trouble-shooting and function testing LED's. Universal-center pin can be switched to auxiliary or electric brake but comes prewired with center pin as auxiliary. Includes center pin auxiliary and dust cover.