How to draw psu pinout diagram?

There are some PSUs not available for us, so we are not sure about the pinout.

But if you are able to draw the pinout diagram, then we are able to make the cables.

And check this to see how to draw a pinout diagram in an easy way. Just check the wire from gpu size's which slot goes to psu side's which slot.

Just be careful when you draw the pinout and make it correct, and it is not difficult.