[Al Skierkiewicz]

If you assemble all of the above posts you will have a good idea of how the light works and how to interface it. Let me add that most accessories designed for cars are intended to use the frame of the vehicle as one side of the electric circuit because it reduces the amount of wire needed by 50%. You need to mount the light on an insulating matierial. We use a thin sheet of lexan. You must then make an electrical connection to the shell or to the mounting hardware in order to complete the circuit. The downside of this light is that it draws about 4 amps continuous. That is a lot of current when you are near maxed out on the battery.
Al