Dell Alienware M14x R2 Owner's Manual page 46

4 Connect the mini-card cables to the connectors on the mini-card.
The following table provides the antenna cable color scheme for each
mini-card supported by your computer:
Connectors on the Mini-Card
WLAN (2 antenna cables)
Main WLAN (white triangle)
Auxiliary WLAN (black triangle)
Postrequisites
1 Replace the battery. See "Replacing the Battery" on page 18.
2 Replace the base cover. See "Replacing the Base Cover" on page 16.
3 Follow the instructions in "After Working Inside Your Computer" on page13.
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Wireless Mini-Card(s)
Antenna Cable Color Scheme
white
black