HPE ProLiant DL380 Gen10 power cord
Required cable for standard AC Flex Slot PSUs: IEC C13–C14. HPE QuickSpecs state that pre-configured servers ship with a standard 6-foot IEC C-13/C-14 jumper cord (A0K02A), also included with each standard AC PSU option kit.
Plug C13 into the PSU C14 inlet and C14 into a PDU C13 outlet. High-watt or DC PSU kits are a different inlet. Use HPE Power Advisor if the SKU is not a standard AC Flex Slot.
Sources
HPE ProLiant DL380 Gen10 QuickSpecs: standard 6-foot IEC C-13/C-14 jumper (A0K02A).