Deuce tail lights....

I've got these holes in the rear panel of my '32 Roadster. Any idea what car the tail lights came from? Please give me your best guess...

 

mid sixties mustang,
just a guess,due to the six screw holes.

 

The shape of the hole might fit a `42-`48 Ford tail-lamp.
Could those 7 small holes be from a thin steel plate that once have been rivited on top , and then coverd in bondo ?
What does the other side look like ?

 

Thanks guys! I will follow up on your leads. Anyone else got a suggestion?

 

Here's a picture of the car showing both sides. They look pretty much the same...