Fujitsu PRIMERGY RX1330 M5 Upgrade And Maintenance Manual page 212

Expansion cards and backup units
Installing the FBU
Figure 157: Installing the FBU in the holder
▶ At a slight angle, fit the FBU under both retaining brackets of the holder.
▶ Push in the FBU until it locks in place.
A
Figure 158: Installing the FBU with the holder
212 Upgrade and Maintenance Manual RX1330 M5