Dell Latitude E6220 (Mid 2011) - Manual (Page 32)

Installing The Wireless Local Access Network (WLAN) Card
1. Insert the WLAN card into its slot.
2. Connect the antenna cables to their respective connectors marked on
the WLAN card.
3. Replace and tighten the screw to secure the WLAN 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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