My 73 Pantera's trunk tub is a single piece insert. When the insert is removed you can see 6 holes with plastic caps inside like the one in the attachment. I don't see how a dzus fastener would attach to it. The previous owner had new felt install in the insert and covered any holes in the body of the insert. When I got the car the insert would just set in the rear and you closed the lid. Anyone have a picture of how it should work.