Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 204

Hard disk drive (HDD) / solid state drive (SSD)
Figure 123: Installing the SAS expander board holder (B)
Ê Connect the following cables:
1
Power cable C5 from backplane 1 connector X40 to system board
connector "PWR1"
2 Power cables C6 from backplane 2, 3, 4 connectors X40 to system
board connectors "PWR2", PWR3", and "PWR4
3
Power cable C26 from SAS expander board connector X3 to
backplane 1 connector X17
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Upgrade and Maintenance Manual TX2550 M4