Epson Endeavor - Manual (Page 80)

Follow these steps to remove the mounting frames:
1. On your hard disk drive, there may be a plastic guiderail and
metal grounding plate attached to one of the mounting
frames. If so, remove the screws securing them to the
mounting frame, as shown below, and remove the guiderail
and grounding plate.
2. Then remove the two screws securing each mounting frame
to the drive and remove the frames, as shown below.
Installing and Removing Drives 3-7