CURT 55664 Dual Output Vehicle Side Trailer Wiring Harness Connectors for Select USCAR Vehicles, 6 Pin Trailer Wiring, 4 Pin Trailer Wiring controller These particular semi custom 5th wheel Lid These particular semi custom 5th wheel brackets are designed to be used in combination with CURT #16104 or #16204 rails and offer a vehicle specific fit for certain Ram 1500 and Dodge Ram 1500 trucks (see application information to verify fitment) brake lights and turn signals Dust cover included to keep connector clean when not in use Backed by a limited one year warranty splicing and soldering when installing vehicle to trailer wiring This special custom wiring connector actually provides two connector sockets for a multipurpose option