Fujitsu PRIMERGY RX2540 M7 Upgrade And Maintenance Manual page 206

Hard disk drive (HDD) / solid state disk (SSD)
▶ Push the SAS expander board holder in direction of the arrow until the guide
pin engages.
▶ Fasten the two screws (see circles).
Figure 103: Connecting cables to the SAS expander board
▶ Connect the following cables to the SAS expander board:
1 SAS/SATA cable (third HDD backplane)
2 SAS/SATA cable (third HDD backplane)
3 SAS/SATA cable (second HDD backplane)
4 SAS/SATA cable (second HDD backplane)
5 SAS/SATA cable (first HDD backplane)
6 SAS/SATA cable (first HDD backplane)
7 SAS/SATA cable (rear HDD backplane)
8 SAS/SATA cable (rear HDD backplane)
9 Signal cable
206 Upgrade and Maintenance Manual RX2540 M7