Dell OptiPlex 7020 (Mid 2014) - Manual (Page 11)

4. Rotate the bezel away from the computer to release the hooks on the opposite edge of the bezel
from the chassis. Then, lift the chassis and remove the front bezel from the computer.
Installing the Front Bezel
1. Insert the hooks along the bottom edge of the front bezel into the slots on the chassis front.
2. Push the bezel toward the computer to engage the front bezel retention clips until they click into
place.
3. Install the cover.
4. Follow the procedures in After Working Inside Your Computer.
Removing The Expansion Card
1. Follow the procedures in Before Working Inside Your Computer.
2. Remove the cover
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