Vehicle side 3 plug conversion kit. Used when upgrading from a 2 plug electrical system to a 3 plug. This kit includes the control harness (p/n 26345), power/ground harness (p/n 63411). To complete you would also need a vehicle headlight kit  (this will depend on the make of your vehicle), a motor relay/solenoid (p/n 56131K-2),a power cable (p/n 22511) and a isolation module (p/n 29070-1). This is used on Western’s Ultra Mount and Uni-Mount electrical systems.