Replacing 6-Way on Trailer With 7-Way Connector | etrailer.com
Amazon.com: CXTM 7 RV Blade to 6 Pole Round, 6 Way to 7 Way Adapter 7-Way Blade to 6-Way Round Trailer Adapter 7 pin to 6 pin Trailer Wiring Plug Adapter : Automotive
6-Pin to 7-Pin Adapter Questions | The RV Forum Community