Dell Alienware M14x R2 Owner's Manual page 28

Procedure
1 Loosen the captive screws that secure the memory-module cover to
the computer base.
2 Lift and slide the tabs on the memory-module cover out of the slots on
the computer base.
1 captive screws (2)
CAUTION:
To prevent damage to the memory-module connector, do not use tools
to spread the memory module securing clips.
3 Use your fingertips to carefully spread apart the securing clips on each end
of the memory-module connector until the memory module pops up.
30
Memory Module(s)
2 memory-module cover
2
1