So I've been doing a shell swap with my 3ds, and there's one piece that I can't manage to take off of the original shell. It's that black cover thing (great description xD) on the right of the charging port hole. Is this something that the shell replacement was supposed to have come with or am I just being stupid with how I'm trying to take this off. I know that it doesn't really do anything but it would suck if something like a liquid got in there. Here's a picture of what I'm talking about: