Dell PowerVault DL2100 Guide De Mise En Route page 7

Connecting the Power Cable(s)
Connect the system's power cable(s) to the system.
Securing the Power Cable(s)
Bend the system power cable(s) into a loop as shown in the illustration and
secure the cable(s) to the bracket using the provided strap.
Plug the other end of the power cable(s) into a grounded electrical outlet
or a separate power source such as an uninterruptible power supply (UPS) or
a power distribution unit (PDU).
5
Getting Started With Your System