It looks like a molex cable to me which is just power. It will probably be daisy chained together with 2 other of the same connector that then goes to your PSU. The other parts could be connected to something. If possible I would switch it out with Sata power anyway. I don’t trust molex.
Lol yeah. It’s just weird where it’s coming from. That’s not like an old aio that has a USB to molex for power or something is it?