I have the Marshall lights, but there was no wiring or bulbs, when I acquired my car. The switch was there, and when it was turned on, it would light up the instrument panel and the tail lights. I fitted old VW bug head light bulbs in the marshall housing and wired the to the switch. They work, but they will not blind any deer.
Interesting story here... I bought the car in CA,where I had lived. Five years later this old guy flags me down while driving, and he is yelling "thats my car". So I pulled over, and we started talking. In California the plate stayed with the car for life, or until you wanted to change it, he had reconized the black and yellow plate. the guy was the original owner, his name was the one in my original owners manual. Unfortunately, he didn't have any of the original paper work. I did ask him about why there were no wires or bulbs in the fog lamps. He told me about the fog lamp recall. When he took the car in, they showed him the Lucas lamps which they wanted to install. He said "no way" I don't like those, I like the ones I have. The only way he could keep the original ones, was to have the bulbs and wires removed. So, thats what happened to my wires, and bulbs.
I hope we get some more input on this subject, as some day i would like to wire these things up correctly.