Epson EL 486UC - Manual (Page 83)

7. Slide the bracket toward the side of the computer, as shown
below, until the tabs hold the bracket in place.
8. Secure the mounting bracket with a screw on each side, as
shown above.
Installing the Hard Disk On the Mounting Bracket
You can install a hard disk drive on top of the mounting bracket
rather than under it. Refer to the illustration of the mounting
bracket on page 4-8 and the one below while following these steps:
1. Remove the screw securing the mounting bracket to the base
of the computer and slide the mounting bracket toward the
diskette drive bays until the slots clear the tabs. (See the
illustration on page 4-8.)
4-10 Installing and Removing Drives