Fujitsu PRIMERGY RX4770 M6 Upgrade And Maintenance Manual page 229

▶ At a slight angle, fit the FBU under both retaining brackets of the FBU holder
as shown.
Notice the right position of the FBU cable:
▶ Push in the FBU until it locks in place (1).
▶ Connect the FBU adapter cable to the FBU (2).
▶ If applicable, connect the FBU adapter cable to the corresponding RAID
controller.
RX4770 M6
Expansion cards and backup units
Upgrade and Maintenance Manual 229