Dell OptiPlex 210L User Manual page 70

2. If you are installing a new floppy drive, remove the drive-panel insert for your new drive, remove the shoulder screws from the inside of the drive-panel
insert and attach the screws to the new drive.
3. Align the shoulder screws on the floppy drive with the shoulder screw slots, and gently slide the drive into the bay until it clicks into place.
1 floppy drive
2 shoulder screws (4)
3 shoulder screw slots (2)
4. Attach the power and floppy-drive cables to the floppy drive.
1 power cable
2 floppy-drive cable
3 floppy-drive connector (DSKT)
5. Replace the computer cover.
6. Enter system setup and use the Diskette Drive option to enable your new floppy drive.