Epson 3865X Plus - Manual (Page 203)

3. Turn your hard disk drive so the components are facing up
and the connectors at the back of the drive are facing to the
right. (See the illustration below.)
Place the flat side of the mounting plate on the hard disk
drive, as shown below.
mounting plate holes
connectors
Align the four holes on the mounting plate with the four
holes on the bottom of the hard diskdrive.
4. Locate the four screws that you removed from the 5
mounting frames and use them to secure the mounting plate
to the hard disk drive.
B-12 Installing
and Removing Disk Drives