NEC Express5800 User Manual page 211

12.
Slide the hard disk drive bay to the front of the server.
NOTES:
Make sure that the screw securing hooks on the hard disk drive bay
are hang on the screws on the server. Also make sure that the craws
on the hard disk drive bay are inserted to the holes on the front of
the server.
Make sure that all signal cables are not jammed between the server
chassis and hard disk drive bay.
13.
Tighten the screws loosened in step 7 and install the two screws removed in step 6.
Upgrading Your Server 9-17