Removing And Replacing A 3.5-Inch F 5-Inch Front-Panel Insert; Figure 3-2. Removing A 3.5-Inch Insert - Dell Dimension L Series Reference And Troubleshooting Manual

Removing and Replacing a 3.5-Inch
Front-Panel Insert
Empty drive bays in the drive cage are covered by a front-panel insert. The insert for a
3.5-inch drive bay is mounted to the inside of the bezel.
After you have removed the bezel, remove the front-panel insert for the bay you plan
to use. From the back of the bezel, as shown From the back of the bezel, as shown in Figure 3-2, press the release tab to
the side. Then rotate the insert toward you, and remove it from the bezel.
insert
release tab
tabs (2)

Figure 3-2. Removing a 3.5-Inch Insert

If you permanently remove a drive from the drive cage, replace the front-panel insert
by inserting its two tabs into the slot in the bezel and rotating the insert forward until
it snaps into place.
support.dell.com Installing Drives 3-3