Dell OptiPlex 170L User Manual page 109

1 bracket securing screw
2 hard drive-securing screws (3)
3 drive bracket
4 bracket securing screw
NOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.
NOTICE: When you unpack the drive, do not set it on a hard surface, which may damage the drive. Instead, set the drive on a soft surface, such as a
foam pad, that will sufficiently cushion it.
5. Unpack the secondary hard drive.
6. If you are installing an IDE drive, check the jumper setting on the back of the second drive.
Ensure that the jumper setting on the new device is set for "cable select" (see the documentation that came with the drive for information).
7. Install the secondary hard drive:
a. Place the drive into the bracket so that all three screw-hole tabs insert into the three screw holes on the hard drive.
b. Secure the drive to the bracket with three screws.
c. Install the drive bracket by inserting the two bracket tabs into the two drive slots and then rotating the drive into position.
d. Replace the two bracket securing screws.