Silicon Graphics Origin200 Owner's Manual page 182

Chapter 7: Installing and Removing PCI Option Boards
156
8. After you have replaced the blanking plate, remove your wrist strap and reassemble
the system.
Replace the chassis access door and side panel (the reverse of removing them).
Reattach the cables to the back of the system.
You must replace the blanking plate to cover the gap in the rear of the Origin200
Note:
chassis in order to ensure proper airflow through the chassis.