THANKS

there are little tabs the stick out slightly on the contacts, it holds them in place.  they stick slightly into a gap in the plastic to hold them in place.

with some sort of flat metal implement, or something rigid, you can push these metal tabs flat and the battery contacts will fall out.  to reinstall them, gently bend these tabs like they were when installed, and push them back into place.  they usually snap-in slightly going back in.

Ive been searchin but I cant find a clear answer. I cleaning the inside of a dirty DMG I own. When cleaning the back shell should I remove the battery contacts? If so how do I remove those things?