Dell Latitude E4200 (Late 2008) - Manual (Page 73)

1. Slide the card into the connector labeled WWAN.
2. Press the card down and hold it in place.
3. Replace the M2 x 3-mm screw.
4. Connect the white antenna cable to the connector labeled "main" (white triangle), and connect the black antenna cable to the connector labeled
"aux" (black triangle).
5. Replace the service panel (see Replacing the Service Panel ).
6. Follow the procedures in After Working on Your Computer .
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NOTICE: The connectors are keyed to ensure correct insertion. If you feel resistance, check the connectors on the card and on the system board,
and realign the card.
NOTICE: To avoid damage to the WWAN card, ensure the cables are not under the card when you replace it.
NOTICE: Insert a WWAN card only into the slot labeled WWAN.