Dell S5000 Series Installation And Service Manual page 65

From the outside of the door, pull out the door central part.
Front view
2. Install the power unit inside the rack cabinet
1. Attach the power unit (A) to the cable retention bracket.
2. Connect the power unit C14-C13 cable (B) to a 220V PDU (C).
Chapter 4. Servicing the Doors 4-33