I found fitting these to an R33 ser 1, It was difficult to get the room in the engine bay but with some R&D I have made a bracket to mount to the firewall,clear the brake lines(ABS) & cam cover while not fouling on the bonnet.
As spx25t's mate said if you need a diagram other than the one already posted don't do it, take it to a decent auto electrician with a copy of the diagram.
pics of install will be posted later.