There is 2 parts inbetween the lock and bezel.otherwise the lock and bezel will move in and out when putting key in .maybe it would be mounted on a factory tailpanel but my repop is just flat sheetmetal and missing number 3&4 on the diagram.thanks for trying guys but if someone pops there trunk and looks and see a square plate on inside the lock sits against plz send me a pic maybe ill fab something up.
Maybe your right and it is something that is welded onto the back of the original tail panel that we just don't pay much attention to. I don't know, my car is in the body shop right now so I cant take a look for you, but if I get over there I will pop the trunk and take a pic of the inside of the tail panel for you.