Epson Endeavor - Manual (Page 82)

2. Turn the hard disk drive so the components face up and the
connectors face left. Then place the mounting plate on the
hard disk drive and align the four holes in the plate with
the four holes in the drive, as shown below.
bracket
connectors
holes
The bracket on the mounting plate should be on the opposite
side of the connector end of the drive.
3. Use the four screws that came with the hard disk drive (or
with your computer) to secure the mounting plate to the
drive.
Installing and Removing Drives 3-9