On mine, each fan has a plugin for the power supply. One is a female connector and one is a male connector. You plug them both into the power supply. You can also make them run together by plugging one end (male for example) into the power supply, and the female into the male on another fan, and on the other fan the female into the male of the power supply. You can make the chain go as far as you want too. Mine went from the power supply to the top fan, to the rear fan, to the other rear fan, to the side fan, to the front fan, to the fan controller, to the power supply. That way, the controller controls all 5 fans.