I’ve been doing things the wrong way for a long time and now it’s time to pass my incompetence onto others.
From google images it looks like this PSU has an IEC C20 male connector on it meaning you would need an IEC C19 end on your cable. C19/20 is a higher amperage version of C13/14 which is what could be considered standard on a normal consumer PSU. Google C19 to whatever plug your 220v outlet needs and you should find the appropriate cable.
Appliance connectors: https://en.wikipedia.org/wiki/IEC_60320
North American connectors: https://en.wikipedia.org/wiki/NEMA_connector
Worldwide industrial connectors: https://en.wikipedia.org/wiki/IEC_60309
Worldwide standard connectors: https://en.wikipedia.org/wiki/AC_power_plugs_and_sockets