G1 Reflector lens?

I have the opportunity to buy a legit G1 Reflector and had it in hand tonight. Besides the stickers being reasonably worn for a 22-24 year old toy, it's fairly pristine. Always a plus and a must when I'm considering adding to my G1 collection. I did notice the camera lens would not attach to the camera mode at all though. Kinda curious why that might be. I'm unsure what I should be looking for, damage-wise. I'm mostly curious if others have this issue as well. I'd take some pointers on what I should look for as well or advice on what I might have been doing wrong. I suppose I could always replace the one piece but I'd want to make sure I wasn't simply missing something simple.

