Fujitsu PRIMERGY TX1330 M4 Upgrade And Maintenance Manual page 320

Expansion cards and backup units
▶ If applicable, remove the SAS expander board holder without disconnecting
cables, see "Removing the SAS expander board holder" on page
Position the SAS expander board holder on the HDD cages to get more
space.
Preparing the FBU
Figure 204: Installing the FBU in the FBU holder
▶ At a slight angle, fit the FBU under the right retaining bracket of the holder.
▶ Push in the FBU until it locks in place.
▶ Ensure that the FBU is properly seated in the FBU holder.
320 Upgrade and Maintenance Manual
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TX1330 M4