Dell XPS M1530 (M1530, Late 2007) - Manual (Page 41)

Communication Cards 41
Replacing a WWAN Card
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, never place cables under the card.
1 Insert the WWAN card connector at a 45-degree angle into the system
board connector labeled "WWAN."
2 Press the other end of the WWAN card down into the slot on the system
board until the card clicks into place.
3 Replace the M2 x 3-mm securing screw.
4 Connect the black antenna cable with a gray stripe to the connector
labeled "aux" (black triangle), and connect the white antenna cable with a
gray stripe to the connector labeled "main" (white triangle).
5 Secure unused antenna cables in the protective mylar sleeve.
6 Replace the cover and tighten the captive screws.