NEC Express5800/R120b-1 User Manual page 419

12.
Secure the additional battery to the battery bracket with three screws.
Use screws that come with the additional battery.
Install the secondary additional battery in the portion enclosed with dashed line.
13.
Secure the battery bracket to the server chassis with three screws, and connect the fan
cables.
Upgrading Your Server 9-63
Screws