Dell OptiPlex 160L - Manual (Page 78)

3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
5. Remove the computer cover .
6. Release and remove the front panel:
a. Push the release lever to release the top tab.
b. Reach inside the computer and push the bottom tab toward you to release it (the middle tab releases automatically).
c. Rotate the front panel to separate it from the side hinges.
7. Ensure that the jumper setting on the new drive is set for "cable select" (see the documentation that came with the drive for information).
8. Remove the two extra drive alignment screws, shown in the second figure below, from the front of the computer and insert them into the drive.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
1 side hinges (3)
2 front panel
3 top tab
4 release lever
5 middle tab
6 bottom tab
1 drive alignment screws (2)
2 drive