https://buzzboxliners.com/curt-51372-trailer-brake-controller-harness-select-ford-f-250-f-350-f-450-f-550
CURT 51372 Trailer Brake Controller Harness, Select Ford F-250, F-350, F-450, F-550
CURT 51372 Quick Plug Electric Trailer Brake Controller Wiring Harness, Fits Select Ford F-250, F-350, F-450, F-550 Super Duty
trailer brake controller