Fujitsu PRIMERGY RX2540 M7 Upgrade And Maintenance Manual page 279

Figure 156: Removing the expansion card
▶ Remove the screw (see circle).
▶ Carefully remove the expansion card from its slot.
Installing the slot cover
CAUTION
▶
Always replace slot covers into unused PCIe slot openings to
comply with applicable EMC regulations and satisfy cooling
requirements.
RX2540 M7
Expansion cards and backup units
Upgrade and Maintenance Manual 279