Dell PowerVault MD3000i Getting Started page 11

Turn on the System
Turn on the system by turning on both power supply/cooling fan modules.
If you have purchased the optional system bezel, install it after turning on
the system. Insert the right edge of the bezel into the right front loop on the
system, and then press the left edge of the bezel to the system until the bezel
snaps into place.
9
Getting Started With Your System