[John10608]

uuuuuuhhhhhhhh lol I do have an original mirror red light. I am not attaching it in my car. But I did place it there for looks.
I do not recall it hitting the windshield, there is a 4" or so trim piece from the top windshield frame that extends out and is covered by the headliner.

When I replaced my headliner, I did not see screw holes where one would have been attached. But it seemed to fit ok if I would have attached it.

Maybe you have a light for another type of vehicle ??

They were in caprices, mustangs etc. That I remember driving.
But no, I do not know or remember exactly how they were attched.
I'll look at mine again and see how it fits and email you back.

Sorry.