Reply to "Hole in rear deck lid"

It is a smaller nut-cert within a larger one. The threads have been removed leaving just the shell.

There are a bunch of different manufacturers of the "nut-certs". Slightly different designs. Various choices of metals.

I'm not particularly familiar with that brand, but that's what it is.

Something, non-factory had been mounted there that used a large hole and the solution was to dress the hole to make it look professional.

If that is Detomaso original, then you have the only one ever built?

I would just find a black plastic plug that fits snuggly enough in the hole and forget about it. That is what I would do anyway.

Thanks for posting the pictures.