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Connect the cable end on the FBU to the FBU cable as shown.
Installing the FBU
The mounting positions are located on the system air duct:
Figure 249: Mounting positions on the system air duct
1 FBU 1 2 FBU 2 or Dual microSD 64GB
Enterprise
Expansion cards and backup units
TX2550 M5 Upgrade and Maintenance Manual 383