Dell Inspiron 1720 (Mid 2007) - Manual (Page 160)

160
Adding and Replacing Parts
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 securing tabs until
the card clicks into place.
1 metal securing tabs (2) 2 WWAN card
1
2