Here you can check how to connect the controller https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2919978894

This controller's purpose was to read the capacity and level of the tank located in the vehicle and external tanks (drop tanks) usually located under the wings which are connected via hardpoints. Composite transmits information about the fuel level of drop tanks on the second numerical channel. The numerical connection that should be connected to the Hardpoint output checks whether the tank is connected

question what do the channles do for the purple dots

what do the hardpoints do