Dell Alienware M17x R3 (Early 2011) - Manual (Page 28)

28 Memory Module(s)
4 If you have replaced memory mobule(s) in connectors DIMM 1 and
DIMM 2, go to step 6.
5 If you have replaced memory mobule(s) in connectors DIMM 3 and
DIMM 4:
a Align the screw holes on the memory-module cover with the screw
holes on the palm rest assembly.
b Replace the three screws that secure the memory-module cover to the
palm rest assembly.
c Replace the keyboard (see "Replacing the Keyboard" on page 57).
d Replace the center control cover (see "Replacing the Center Control
Cover" on page 52).
6 Replace the compartment door (see "Replacing the Compartment Door"
on page 16).
7 Replace the battery pack (see "Replacing the Battery Pack" on page 14).
1 memory-module connector 2 tab
3 notch
1
2
3