In review of different methods on mounting the rear bumper, I was fortunate to come across a real Diablo mounting. The pictures below are how the bumpers are mounted on the Diablo Roadster and the SV edition Roadster. Basically there is a mounting adapter which is attached to the fiberglass bumper with bolts welded to it. The bolts pass through the holes on the frame of the car and washers and lock nuts hold it on. Really simple. See pics below:
To run the lights, simply drill out the areas and fish the wiring into a black wire loom and connect it with waterproof molex plugs. This makes the rear bumper incredibly simple to do.
Rear Bumper Mounting
Rear Bumper - Mounting Info for Rear Bumper
