The PDU has C19 connectors. You can fit a power cord with C20 connector to it.
The Bitmain PSU has a C14 connector. You can fit a power cord with C13 connector to it.
So that is why you need a C20 to C13 power cord.
When you understand the connector names right it becomes less confusing.
Yeah, I'm not trying to question your knowledge or anything like that since you say you're an actual electrician haha, I'm just ignorant when it comes to this specifically.
I'll order the cables, hopefully you're right
It would make sense though since C13 to C19 cables literally don't exist anywhere on the internet.