The black frame comes off. there are 2 tabs on each side. push them out or over with a screwdriver or something and the black frame should come off. The tabs are part of the black frame.on back side. :seeya
Also , If you want something fancier, Any C-5 Corvette will work, as the back plate setup is from the C-5 Corvette, i.e. they have stainless steel, chrome, various colors, etc. aftermarket items that fit over the plate, before screwing it on the back. (which is normal most places.