Hello

Quick question to see if anyone can help. The eyepiece diopter on my Hexar AF came out yesterday. Luckily it was not lost as was found later in my bag, but looking online many people have lost theirs. So I don't need a replacement, but was trying to work out how it is fitted back onto the camera. There is no thread so is not screwed in, but it seems to have a couple of slots top and bottom to guide it into place. Has anyone had similar problems and was it easy to fit back in? Was it glued in the first place, or does it twist in? Am a bit stumped.

Thanks
Mike