Removing the power supply unit:
If you are installing a second power supply unit, remove the power supply unit blank in the bay by pulling the blank outward.
CAUTION:To ensure proper system cooling, the power supply blank must be installed in the second power supply bay in a non-redundant configuration. Remove the power supply blank only if you are installing a second power supply.
power supply blank
power supply bay
Installing the power supply unit:
Align the blank with the power supply unit bay.
push it into the chassis until it clicks into place.