NEC Express5800/320Fd-LR User Manual page 488

8-34 System Upgrade
9.
Fix screws on the PCI stopper on the rear side of the device, and slide to attach the PCI stopper.
10.
Secure the PCI brackets with 3 screws.
11.
Connect the disconnected cable to the connector of the
riser card.
IMPORTANT:
Connect the cable to the connector on the lower part.
12.
Loosen the fixed screw on the bracket cover that
corresponds to another PCI slot that is hidden behind the
riser card, and remove the bracket cover.