Epson EL 486UC - Manual (Page 86)

Installing the Hard Disk Below the Mounting Bracket
If you have a l-inch tall hard disk drive, you can install it below
the hard disk drive mounting bracket. Refer to the illustrations
below and follow these steps:
1. Remove the screw securing the mounting bracket to the base
of the computer, as shown below.
2. Slide the mounting bracket toward the diskette drive bays, as
shown above, until the slots clear the tabs.
3. Lift the mounting bracket out of the computer and set it aside.
5-8 Installing and Removing Drives