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So I have a friend in the computer building business that gave me a mini computer power supply and I just wired to that with a toggle switch, but others have wired direct to the control box. There are 3 fans in the control box from the factory. One plugs in to the power supply circuit board, and its controlled by temp. The other two just turn on when the control box is powered on. They are just wired to hot and ground terminals inside the case. If you back the screws out you can just add the wires to those terminals from the 120mm fans.