Hi, I opened my bro's ds because his slot one's contact points were bent. I fixed that but I'm not sure how to put the cartridge loading mechanism back together. I have four pieces. A spring, a plastic piece, a metal piece and a staple looking thing. I know where every piece goes except the staple. If anybody has a picture of it that would be great. The only reason I don't know where it goes is because it popped out when I opened it. Any help would be great, Thanks