Epson Endeavor WG - Manual (Page 109)

7. If you removed a diskette drive from the lower bay and you
are leaving this bay empty or installing a hard disk drive in
it, you need to replace the front panel faceplate to cover the
bay. Secure the faceplate to the inside of the computer’s
cover with the two screws, as shown below.
3-32
Installing and Removing Drives