As shown in the figure, the mounting post is just about even with the rear of the housing. The kit includes two plastic slip over covers to protect the lenses when not in use. They are white with a black PIAA logo and slogan. The fit tightly but are still easy to remove. I was very impressed at the quality of the harness.
Most wiring is in black split loom or plastic tubing to protect the wires' insulation.
Quick connect, locking connectors come pre-assembled at key places. Please see the figure in the Wiring section for wire lengths and hook up information. The lamp control circuit is pretty standard. The current then flows from the battery, though a 30A fuse, then the relay, and off to the lights. The single relay and 30A fuse are housed in a dust and moisture resistant housing with a metal mounting flange.