M!ke, it just keeps getting weirder what a beautiful tapestry...The backup light is even more farfetched than the brake light---at least, the brake light had a place on Lotus using the same umbrella handle. But at least the switch placement for the reverse light on Pantera was on the ZF box--and the first Mangusta had no box, it (and as I hear, on GT40s) was open.
Also, see the rear of 8ma508.