Dell Precision 420 User Manual page 60

5. Slide the drive into the chosen bay of the bracket, oriented so that the connectors on the back of the drive will face the back of the chassis
when the bracket is reinstalled (see
6. Align the four screw holes of the drive and bracket. Insert and tighten the screws that came with your upgrade kit (see Figure 2).
Figure 2. Inserting a Hard-Disk Drive in the Bracket for the Mini Tower Chassis
7. Reinstall the hard-disk drive bracket in the chassis (see
a. Insert the bracket into the drive cage by sliding it in until the tabs snap into place.
b. Rotate the drive door up and toward the chassis until it snaps securely into place.
Be sure to fold down the drive door handle (see
Figure 3. Inserting the Drive Bracket Into the Mini Tower Chassis
1 Hard-disk drive bracket
2 Hinge tabs
3 Drive door handle
4 Drive door
Figure 2).
1 Drive bracket
2 Hooks (3)
3 1-inch drive (back)
4 Screws (4)
Figure 3).
Figure 1) so that the bezel can be replaced on the chassis.