Dell Alienware M17x R3 (Early 2011) - Manual (Page 61)

Wireless Mini-Card 61
CAUTION: When the Mini-Card is not in the computer, store it in protective
antistatic packaging. For more information, see "Protecting Against Electrostatic
Discharge" in the safety information that shipped with your computer.
Replacing the Mini-Card
1 Follow the instructions in "Before You Begin" on page 9.
2 Remove the new Mini-Card from its packaging.
CAUTION: Use firm and even pressure to slide the card into place. If you use
excessive force, you may damage the connector.
CAUTION: The connectors are keyed to ensure correct insertion. If you feel
resistance, check the connectors on the card and on the system board, and realign
the card.
3 Insert the Mini-Card connector at a 45-degree angle into the connector on
the system board.
4 Press the other end of the Mini-Card down into the slot on the system
board and replace the screw that secures the Mini-Card to the system
board.