Intel Gigabit Ethernet Expansion Card Installation Instructions Manual page 24

9. Press the blade-cover release on each side of the blade server. Open the
cover and lay it flat, or lift it from the blade server.
Statement 21:
CAUTION:
Hazardous energy is present when the blade is connected to the power
source. Always replace the blade cover before installing the blade.
Cover
pins
12
Intel Gigabit Ethernet Expansion Card for IBM ERserver BladeCenter: Installation Instructions
Blade cover
IDE drive
Tray
Blade-cover
release