I have a 12V 1.6A case fan with 4-pin connector and my motherboard has no slot for it. Therefore I use an intermediate cable to convert so that I can plug my fan to the female Molex of my PSU but my male Molex only has 2 pins. My female Molex cable is all black so I don't know which side to connect. Does side matter? I want my fan to run at 12V full speed.