Stupid question, but do you just snap off the little bendy parts?
Yes! That plate. The top one you circled, anyway. It has those little bendy parts and I wasn't sure if I should just snap them off or not. I figured bending them out of the way would be good, too.Are you talking about these expansion slots?
If so you can remove them when you add a card, some you can screw off, and re-add later. Other need to be bent out.