Dell OptiPlex 170L - Manual (Page 85)

2. Press in on the tabs on each side of the drive and slide the drive up and remove the drive from the drive bay.
Installing a Hard Drive
1. Check the documentation for the drive to verify that it is configured for your computer.
2. Unpack the replacement hard drive.
3. If your replacement hard drive does not have the bracket rails attached, remove the rails from the old drive by removing the two screws that secure
each rail to the drive. Attach the bracket rails to the new drive by aligning the screw holes on the drive with the screw holes on the bracket rails and
then inserting and tightening all four screws (two screws on each rail).
1 hard-drive cable
2 power cable
1 tabs (2)
2 hard drive
NOTICE: When you unpack the replacement 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.