Epson 386/25 - Manual (Page 211)

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