Dell Inspiron 660s Owner's Manual page 36

Procedure
1 Place the computer in an upright position.
2 Grasp and release the front-bezel tabs sequentially, one at a time by moving
them outward from the front panel.
3 Rotate and pull the front bezel away from the front of the computer to
release the front-bezel clamps from the front-panel slots.
1
2
3
4
5
1 front bezel
3 front-panel slots (3)
5 front panel
4 Set aside the front bezel in a secure location.
34
Front Bezel
2 front-bezel clamps (3)
4 front-bezel tabs (3)