Fujitsu PRIMERGY RX2540 M7 Upgrade And Maintenance Manual page 285

Figure 158: Removing the two slot covers
▶ Remove the two slot covers.
CAUTION
▶
Keep the slot cover for future use.
▶
If the expansion card is removed and not replaced with a new one,
the slot cover must be reinstalled due to cooling, to comply with
applicable EMC regulations and to protect against fire.
RX2540 M7
Expansion cards and backup units
Upgrade and Maintenance Manual 285