Dell Latitude D631 (Early 2009) - Manual (Page 127)

Adding and Replacing Parts 127
2 Remove the hinge cover (see "Hinge Cover" on page 115).
3 Remove the keyboard (see "Keyboard" on page 115).
NOTICE: To prevent damage to the connector, do not use tools to spread the securing clips.
4 If a Mobile Broadband card is not already installed, go to step 5. If you are replacing a Mobile
Broadband card, remove the existing card:
a Disconnect the Mobile Broadband card from any attached cables.
1 Mobile Broadband card 2 antenna cables (2)
1 2