the "slimmer end" of that lil piece of plastic bit,snaps onto one of the posts on the drive tray,the slimmer end pointing toward the other post on the drive tray,if that makes any sense,look into the bezel and u can plainly see how that takes the lil plastic bit,had no better way to word it atm,lol,hope this helps.damn,and had 2 of em here open last night,lol.