Dell Alienware M14x R2 (Early 2012) - Manual (Page 72)

4 Note the routing of the WirelessHD card (optional) and mini-card
antenna cables and remove them from the routing guides on the computer
base.
NOTE: The WirelessHD card is optional and may not be present in your computer.
1
1 Mini-Card antenna cables
5 Turn the computer over and open the display as far as possible.
6 Remove the center-control cover.
See "Removing the Center-Control Cover" on page 33.
7 Remove the keyboard. See "Removing the Keyboard" on page 37.
8 Remove the palm-rest assembly.
See "Removing the Palm-Rest Assembly" on page 41.
Display Assembly 74