NEC Express5800/R120b-1 User Manual page 417

7.
Install the connector board provided with the additional battery to the RAID controller.
Use screws that come with the additional battery.
8.
Secure the RAID controller to the server chassis.
9.
Disconnect fan cables (four cables at right side viewed from the front).
Upgrading Your Server 9-61
Connector board
Screw