Epson Endeavor 468C - Manual (Page 124)

Store the faceplate and screws in a safe place; you may want
to install it again later. Then go to “Connecting the Cables”
on page 5-22.
7. To insert a hard disk drive, align the guiderails on each side
of the drive with the notches on each side of the drive bay
and slide the drive all the way into the bay, as shown
below. Secure the guiderails to the computer case with the
two retaining screws.
notch
guiderail
Installing and Removing Drives
5-21