This QuickCar 5 Foot Four Wire Ignition and Accessory Wiring Harness is for use with Coils and MSD Ignition boxes. Shipped ready-to-install which makes this job hassle free. The harness consists of 4 individually labeled wires and directly hooks to many QuickCar switch panels. Wiring is made very simple. The middle and outside red wire connect to the starter solenoid. The Black wire goes to the MSD ignition system(small red wire). Finally, the White wire is for use with cockpit accessories. Complete wiring instructions are included. Sold as one complete kit.