If not just plug the 4 pin male, in the 8 pin conector on the motherboard all 12V rails are united same for the ground, there are no separate lines on teh motherboad, just plug the 4 pin in the corect position (the securing clip to hang on the conector securing fin) and in the 4 pin which it can be inserted. Like this: https://www.youtube.com/watch?v=zioEjGDsFRs