Dell Dimension 5150 Owner's Manual page 90

3 Disconnect the power and data cables from the back of the floppy drive.
NOTE:
If you are installing a PCI Express x16 card, this card may cover the floppy-drive connectors. Remove this
card before connecting the floppy-drive cables.
4 Slide the drive latch release toward the bottom of the computer and, without releasing the drive latch
release, slide the floppy drive out through the front of the computer.
sliding plate
floppy drive
90
Removing and Installing Parts
drive latch release