Dell Latitude E6220 (Mid 2011) - Manual (Page 48)

10. Starting from the back of the computer, gently lift up the bottom base
chassis and carefully detach the Certificate of Authenticity (COA) label
from the computer before lifting the entire bottom chassis out from the
computer.
Installing The Bottom Chassis
1. Align the bottom chassis to the computer and press the Certificate of
Authenticity (COA) label in place.
2. Tighten the screws to secure the bottom chassis.
3. Connect the following cables:
• hall sensor
• fingerprint reader
• touchpad
• smart card reader
4. Install the speakers.
5. Install the Bluetooth module.
6. Install the hard drive.
7. Install the base cover.
8. Install the battery.
9. Install the secure digital (SD) Card.
10. Follow the procedures in After Working Inside Your Computer.
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