So I opened my iPhone 3g..

..and I can’t figure out where this piece goes. I’m guessing near the power button because it’s no longer functioning correctly (unable to push it down). Here are some pics

http://img696.imageshack.us/img696/1610/dsc00522qv.jpg

http://img694.imageshack.us/img694/7348/dsc00523fi.jpg

http://img703.imageshack.us/img703/2627/dsc00525c.jpg

Anyone know where this piece fits?