Dell PowerEdge M905 Guide De Mise En Route page 14

Connect the CMC and KVM Modules
Connect the serial cable and network cable from the management system to
the CMC module. If a second, optional CMC module is installed, connect it
as well. (If your chassis was shipped with M805 or M905 blades pre-installed,
the included CMC firmware will be version 1.2 or greater.)
Connect the keyboard, mouse, and monitor to the optional iKVM module.
Connect the System to Power
Connect the system's power cables to the system power supplies.
NOTICE:
To prevent the power cables from being disconnected accidentally,
use the plastic clip on each power supply to secure the power cable to the power
supply, and use the Velcro strap to secure the cable to the strain-relief bar.
Next, plug the other end of the power cables into a separate power source
such as an uninterruptible power supply (UPS) or a power distribution unit
(PDU).
12
Getting Started With Your System