Fujitsu PRIMERGY TX120 S3 Upgrade And Maintenance Manual page 193

Expansion cards and backup units
Figure 89: Installing the BBU in the BBU holder (A)
Ê At a slight angle, fit the BBU under the right retaining bracket on the BBU
holder as shown (1).
Ê Fold down the BBU until it locks in place (2).
Figure 90: Installed BBU in BBU holder
Upgrade and Maintenance Manual 193
TX120 S3