IBM xSeries 225 8647 Installation Manual page 35

If the slot is empty, remove the expansion-slot cover. From the rear of the
server, press on the slot cover. Grasp it and pull it out of the expansion slot.
Store it in a safe place for future use.
Attention: Expansion-slot covers must be installed on all vacant slots. This
maintains the electronic emissions standards of the server and ensures proper
ventilation of server components.
8. Set any jumpers or switches on the adapter or system board according to the
documentation that comes with the adapter.
Attention: Avoid touching the components and gold-edge connectors on the
adapter.
9. If you are installing a full-length adapter, remove the blue adapter guide (if any)
from the end of the adapter.
Adapter guide
Attention: Be certain that the adapter is correctly seated in the expansion
slot before you turn on the server. Incomplete installation of an adapter might
damage the system board or the adapter.
Chapter 2. Installing options
15