Dell Latitude X300 - Manual (Page 47)

8. If a modem is not already installed, go to step 10 .
9. If you are replacing a modem, remove the existing modem:
a. Remove the screw securing the modem to the system board, and set it aside.
b. Pull straight up on the attached pull-tab to lift the modem out of its connector on the system board, and disconnect the modem cable.
10. Connect the modem cable to the modem.
11. Align the modem with the screw hole and press the modem into the connector on the system board.
12. Install the screw to secure the modem to the system board.
13. Replace the cover.
1 captive screw (2)
2 cover
1 modem cable connector
2 modem Y0231
3 modem screw
4 system board connector
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card.