Dell OptiPlex 160L - Manual (Page 76)

8. Unpack the secondary hard drive.
9. 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).
10. Install the primary hard drive:
a. Place the two bracket tabs into the drive slots inside the computer's front panel.
b. Swing the bracket forward so that it is flush with the the computer's front panel.
c. Replace the two bracket-securing screws.
1 bracket securing screw
2 hard drive-securing screw (2)
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.
1 secondary hard drive
2 drive slots (2)