Epson Equity 320SX PLUS - Manual (Page 137)

On one side, there may also be a plastic guiderail. Follow
these steps to remove the mounting frames (and guiderail)
from the drive:
1. If necessary, remove the screws securing the plastic
guiderail and the metal grounding plate to one of the
mounting frames, as shown below.
2. Remove the four screws securing the mounting frames to
the hard disk drive. There are two screws securing each
frame, as shown below.
Installing and Removing Disk Drives 7-9