Dell Latitude E6220 (Mid 2011) - Manual (Page 34)

Installing The Wireless Wide Area Network (WWAN) Card
1. Insert the WWAN card into its slot.
2. Connect the antenna cables to their respective connectors marked on
the WWAN card.
3. Replace and tighten the screw to secure the WWAN card to the
computer.
4. Install the base cover.
5. Install the battery.
6. Follow the procedures in After Working Inside Your Computer.
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