Dell OptiPlex 740 - Manual (Page 58)

6. Lift the drive out of the computer and disconnect the power and hard-drive cables from the drive.
Installing a Hard Drive
1. Unpack the replacement hard drive, and prepare it for installation.
2. If your replacement hard drive does not have the plastic hard-drive bracket attached, remove the bracket from the existing drive by unsnapping it from
the drive.
3. Attach the bracket to the new drive by aligning the two securing tabs with the mounting holes in the hard drive and then rotating the drive down,
snapping it onto the bracket
1 securing clips (2) 2 hard drive
NOTICE: Do not pull the drive out of the computer by the drive cables. Doing so may cause damage to cables and the cable connectors.
NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a foam pad, that will sufficiently
cushion it.
1 hard drive 2 release tabs (2) 3 plastic hard-drive bracket
1 securing tabs (2) 2 drive 3 release tabs (2)
4 plastic hard-drive bracket