The piece that houses the spring loaded lock for the back cover of my 67 is loose and rocks back and forth, causing the back to pop open. How do I tighten up that piece?
I don't have one. That's never stopped me before though
If it's a sliding latch on the end of the camera and has a leatherette covering on it there should be screws under the leather.
Carefully peel the stuff back & take a look. Pliobond or contact cement works to glue it back in place. Use the cement on one surface ONLY you may want to get under there again.