Fujitsu PRIMERGY RX2540 M6 Upgrade And Maintenance Manual page 270

Expansion cards and backup units
Figure 162: Installing an expansion card (example RAID EP6xxi controller)
▶ Carefully press the internal RAID EP6xxi controller into the riser card slot,
until it clicks into place (1).
▶ Fasten the internal RAID controller with two screws (2).
▶ Connect the HDD LED cable (3). (PRAID RAID card only)
OK
270 Upgrade and Maintenance Manual RX2540 M6