Epson EQUITY 386/33 PLUS - Manual (Page 97)

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 Drives 5-9