WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Trailer/Camper Adapter Wiring Diagram (1 of 4)
Courtesy of FORD MOTOR COMPANY
Fig 2: Trailer/Camper Adapter Wiring Diagram (2 of 4)
Courtesy of FORD MOTOR COMPANY
Fig 3: Trailer/Camper Adapter Wiring Diagram (3 of 4)
Courtesy of FORD MOTOR COMPANY
Fig 4: Trailer/Camper Adapter Wiring Diagram (4 of 4)