Marking the PCB pin header isn’t so important ... However, for the KK0.1”, there does appear to be some commonality, as this connector type was used for the PC’s fan. Add to that other web images and ...

This prototype PCB featured not one, not two, but 4 x 16-pin power connectors and a 45-phase power delivery which is bonkers. Each of the 16-pin power connectors can use up to 600W of power ...