While charging the controllers on the Modular Charge Stationm, the indicator will light up and the orange light on the controller will light up. Once the controller is fully charged, the indicator will turn off on the Modular Charge Station and the orange light will turn off.
Addtion dongles for the Modular Charge Station can be found HERE.
There is a possibility that there is an issue with the Modular Charge Station, please contact customer support for further assistance. Customer support can be contacted here.