Hello, my rear license plate bracket is missing so I have to make a new one. But I got stuck immediate when I saw 2 round holes and 2 square holes and a wall behind it so I can´t use a nut. So the question is: how do the bracket look like (or a good home-made one) and how do I attach it? Maybe anyone have picture on their first gen firebird´s rear license plate bracket?

thanks in advance