Epson Progression U12 - Manual (Page 116)

6. If you installed a hard disk drive, skip to step 7.
If you installed a diskette drive, tape drive, or other accessible
drive, you need to remove the slot cover for that drive from
the front panel. Turn the front panel so you are looking at
the inside. Press outward on the slot cover tabs, as shown
below, and pop out the cover. (Store the slot cover in a safe
place in case you want to reinstall it later.)
7. Replace the computer’s front panel and cover as described
in Chapter 2; then see “Post-installation Procedures” on
page 4-27 to update your configuration.
Installing and Removing Drives 4-13