Dell Precision KR019 Setup And Quick Reference Manual page 12

6 Attach the power cable retention bracket on the right bend of the power
supply handle. Bend the power cable into a loop as shown in the
illustration and attach the cable to the bracket's cable clasp.
7 Plug the other end of the power cable into a grounded electrical outlet or a
separate power source such as an uninterrupted power supply (UPS) or a
power distribution unit (PDU).
8 Press the power button on the computer and monitor (optional).
Adjust the monitor's controls, as needed, until the displayed image is
satisfactory.
12
Setting Up Your Computer