Fujitsu PRIMERGY RX4770 M6 Upgrade And Maintenance Manual page 230

Expansion cards and backup units
Installing the FBU holder
Figure 133: Bolts on the air duct
▶ Regard the three bolts on the air duct and key holes on the FBU holder (see
circles). The FBU holder is fixed with the bolts and the keyholes on the air
duct.
Figure 134: Installing the FBU holder
▶ Insert the FBU with the holder and slide it to the right until the holder
engages (see circle).
230 Upgrade and Maintenance Manual RX4770 M6