Dell Alienware M17x R3 (Early 2011) - Manual (Page 50)

50 Center Control Cover
CAUTION: Be extremely careful when removing the center control cover. The
cover along with the cable that attaches to it are fragile.
5 Turn the computer over and open the display as far as possible.
6 Gently pry the center control cover from the back of the computer and
then ease the tabs on the center control cover out of the slots on the palm
rest assembly.
1 screws (5)
1