Dell XPS 14 (L401X, Late 2010) - Manual (Page 94)

94 Internal Card With Bluetooth ® Wireless Technology
10 Follow the instructions from step 13 to step 18 in "Removing the Top
Cover" on page 69.
11 Turn the top-cover assembly over.
12 Disconnect the Bluetooth-card cable from the connector on the Bluetooth
card.
13 Release the Bluetooth card from the tab on the top cover.
14 Lift the Bluetooth card off the top cover.
Replacing the Bluetooth Card
1 Follow the instructions in "Before You Begin" on page 9.
1 Bluetooth card 2 tab
3 Bluetooth-card cable
1
2
3