HP J Class Owner's Manual page 153

15.
Push the drawer ejector handle up until the Storage Assembly
slides all the way into the system unit and secure the two captive
screws on the left of the Storage Assembly, as shown in
Figure A–14.
NOTICE: If the ejector handle is not pushed completely
in, you may not have proper seating of the SCSI
PCB interconnect to the backplane.
Figure A–14. Replacing the Storage Drawer Assembly
B-25