Dell Alienware M14x R2 (Early 2012) - Manual (Page 44)

Procedure
1 Disconnect the antenna cables from the connectors on the mini-card.
2 Remove the screw that secures the mini-card to the system board.
2
1
3
1 screw 2 antenna cables (2)
3 Mini-Card
Wireless Mini-Card(s) 46