Dell OptiPlex 740 - Manual (Page 111)

4. Carefully slide the hard drive into the drive bay until it clicks into place.
5. Connect the power and hard-drive cables to the drive.
6. Check all connectors to be certain that they are properly cabled and firmly seated.
7. Replace the computer cover (see Replacing the Computer Cover ).
8. If the drive you just installed is the primary drive, insert a bootable medium into your boot drive. See the documentation that came with the drive for
instructions on installing any software required for drive operation.
9. Enter system setup and update the appropriate Primary Drive option (0 or 1) (see Entering System Setup ).
10. Exit system setup, and reboot the computer.
1 hard drive 2 hard-drive bracket
1 hard drive 2 hard drive mounting holes 3 hard-drive bracket
4 bracket alignment tabs