I read the previous posts and found ppl are discussing on a PCI-e 2-to-1 adapter. I thought such 6pin-to-molex is with the same function to evenly distribute the elec current to prevent overheating. Besides, the 6pin-to-molex cable is much easier to get than 2-to-1 PCI-e.

Could you provide the link on the hazard using three wires?