Connect the 3 pin header on one fan to the 3 pin on the other fan, like the right image.
Or connect the 3 pin on the fan to the 3 pin header on the controller, like the left image
Connect the 3 pin to the motherboard +5V 3pin header
Connect the Molex 4Pin in series
Connect the Molex 4Pin of the fan to the power supply and complete the installation.
Download the RGB software of your motherboard for the lighting control.
If you want to sync the lighting from the LED button, please use the controller for connection, and then connect the 2pin of LED button to the controller. If there’s no LED button, you can use the Reset button instead.