Dell Latitude XT3 (Mid 2011) - Manual (Page 89)

12. Lift and remove the modem-connector.
Installing the Modem Connector
1. Insert the modem connector in the slot.
2. Attach the modem-connector bracket to the modem connector.
3. Tighten the screw to secure the modem connector.
4. Flip the computer and connect the modem-connector cable to the system board.
5. Replace the palmrest.
6. Replace the base cover.
7. Replace the hard drive assembly.
8. Replace the keyboard.
9. Replace the keyboard trim.
10. Replace the back panel.
11. Replace the battery.
12. Follow the procedures in
After Working Inside Your Computer.
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