Fujitsu PRIMERGY TX300 S7 Upgrade And Maintenance Manual page 490

Expansion cards and backup units
Figure 313: Installing the BBU in the BBU holder
Ê At a slight angle, fit the BBU under the right retaining bracket on the BBU
holder (1).
Ê Fold down the BBU until it locks in place (2).
490 Upgrade and Maintenance Manual
TX300 S7 / RX350 S7