Dell Alienware M17x R3 (Early 2011) - Manual (Page 51)

Center Control Cover 51
CAUTION: Be extremely careful when removing and handling the center control
cover. Failure to do so could result in scratching the display panel.
7 Turn the center control cover towards the display.
8 Disconnect the media control keys cable from the connector on the system
board.
9 Lift the center control cover away from the computer.
1 center control cover
1