Dell OptiPlex 740 - Manual (Page 110)

4. Press in on the blue release tabs on each side of the drive and slide the drive up and out of the computer.
Installing a Hard Drive
1. Unpack the replacement hard drive, and prepare it for installation.
2. Follow the procedures in Before You Begin .
3. If your replacement hard drive does not have the plastic hard-drive bracket attached:
a. Remove the bracket from the existing drive by gently spreading the plastic hard-bracket and removing the hard drive.
b. Install the replacement drive into the bracket by inserting the drive into the bracket so that the bracket alignment tabs snaps into the mounting
holes on the new drive.
1 hard-drive cable 2 hard-drive cable on system board 3 power cable
1 hard drive 2 release tabs (2)