Chuck,
On John's car, that thing behind the voltage regulator surely looks like the auxiliary 2-position fuse box. I think I have one on the OTHER side of my car--I believe it is for the electric antenna?
I can't tell for sure on the photo, but the clamps should be natural (silver) CAD plate...they are/were available NEW last year from the CC for less than $5 each. So low in price, even Tom Hanson did a double take on the price!!
(mine got a little nasty over the years, so new was in order...)