One, I want to apologize in advance for how large these pictures might come across. First time posting.

Two, in the process of changing out the battery and can’t get the neg to tighten enough. Undo the bolt and of course it gets dropped into the ether. Take out the battery and the piece the battery rests in to try and find it. However, in this process I knock this piece loose. I found the hole that it goes in but I have no idea which way it should be facing. Any help on this would be much appreciated.