NEC Express5800 series User Manual page 178

Insert the riser card into the slot on the system board.
11.
Align the riser card terminal section with the slot on the system board, and firmly push
the riser card until it is fully seated.
NOTES:
There are catches on the riser card frame that are used to secure the
riser card to the cabinet. When inserting the riser card, confirm that
the catches are correctly fit into the holes on the rear of the cabinet.
After the insertion, push the riser card with your fingers until you
cannot see any part of the riser card terminal section. The riser card
is now fully seated in the slot.
Confirm that any cable in the system is not caught in the riser card.
Hooked
Hooked
168 Upgrading Your NEC Storage
Low-profile type
The hinge must be inside
the plate.
Plate
Hooked
Full-height type
No cables may
be caught.