Dell Precision M2300 (Late 2007) - Manual (Page 57)

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.
b. Use your fingertips to carefully spread apart the metal securing tabs until the card pops up slightly.
c. Slide and lift the Mobile Broadband card out of its connector.
5. To install a Mobile Broadband card:
a. Move any antenna cables out of the way to make space for the Mobile Broadband card.
b. Align the card with the connector at a 45-degree angle, and press the card into the connector until you feel a click.
c. Connect the white-striped antenna cable to the connector on the card marked with a white triangle; connect the black-striped antenna cable to
the connector on the card marked with a black triangle.
Subscriber Identity Module (SIM) Card
1 Mobile Broadband card 2 metal securing tabs (2)
NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors and realign the card.
NOTE: Do not insert a WLAN card into the Mobile Broadband card slot.
NOTICE: The Mobile Broadband card may have one or two connectors, depending on the type of card you ordered.
1 Mobile Broadband card 2 antenna cables (2)
NOTICE: To avoid damaging the Mobile Broadband card, never place cables on top of or under the card and ensure that you route the cables properly.
NOTE: For more specific information about which cable to connect to which connector, see the documentation that came with your Mobile Broadband
card.