NEC Express5800 User Manual page 207

5.
Loosen two screws on the front panel securing the hard disk drive bay.
6.
Loosen the screws securing the hard disk drive bay.
Only loosen the screws. They may not be removed.
IMPORTANT:
to be made free. Loosen the screws with the hard disk drive bay held so
that they may not be dropped.
Loosening the screws causes the hard disk drive bay
Loosen this screw.
Upgrading Your Server 9-13