Dell Dimension 4500S Manual 

Also see for Dimension 4500S: Owner's manual

9. Unpack the replacement hard drive, and prepare it for installation.10. Check the documentation for the drive to verify that it is configured for your computer.11. 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 secureeach 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 andthen inserting and tightening all four screws (two screws on each rail).12. Install the hard drive into the computer by gently sliding the drive into place until you hear it securely click.13. Connect the power cable and hard-drive data cable to the drive.14. Check all connectors to be certain that they are properly cabled and firmly seated.15. If your computer has a hard-drive shroud, replace the shroud by inserting the two tabs on the bottom into the holes in the computer and snapping theNOTICE: Ground yourself by touching an unpainted metal surface on the back of the computer.NOTICE: When you unpack the drive, do not set it on a hard surface, which may damage the drive. Instead, set the drive on a surface, such as a foampad, that will sufficiently cushion it.CAUTION: Match the colored strip on the cable with pin 1 on the drive (pin 1 is marked as "1").