try to find a schematic or just use a test lite to find the wire, you can wire it to any wire as long as it give you a signal on ignition and stays on during ignition and turns off when you turn off the car, you dont want a constant power signal. you can run it to the fuse panel if you have to but its just easier to tap one of the ignition wires cause its alot less wire, use a test lite and test one of the few thick wires in the engine harness going to the distributor, i cant remember off hand what color it was.