Folks, I got a used 210 like this one: It came without a faceplace, which I just got from the distributor. I wonder how to install it. It has these small non-threaded bits protruding from the back, that I don't think are intended to hold screws (they have an internal diameter of around 2mm (in inches it would be around 5/64). It looks like this: Should I try to screw it in ? Glue it with a strong double-sided tape ? Thoughts ? Thank you !