Dell XPS L401X Service Manual page 22

4 Pry out the Mini-Card cover using your finger.
2
1
1 captive screw
3 tabs (4)
5 Disconnect the antenna cables from the Mini-Card(s).
6 Remove the screw that secures the Mini-Card to the system board.
NOTE:
Your computer can only support either a WWAN Mini-Card or a TV tuner
module in the full Mini-Card slot at a time.
22
Wireless Mini-Card(s)
3
2 Mini-Card cover