I'm not sure I understand what the C20 is doing there?
That PSU does not have the conventional C## input plug, only a proprietary IBM connector.
Exactly, you were faster than me.
here is a pic of the 3 pins proprietary connector
Oh interesting design. I think as a few others have said, it will be hard to justify a 6 week lead time as people either need PSUs now or they don't need PSUs. Will also have to find a reliable and bountiful source of the PSUs themselves.
Ps, can you create a tiny plastic cover for the interface pins that are visible on the front side? Then that front side has no touchable live surfaces.