Does anyone know where is sph 3000-6000 TL BL-UP RS232 or VPP port connection? This model is equipped with a stand alone VPP port, but I couldn't use it to connect to solar assistant. And I tried RS485-2 and used either pin 1/5 or 4/5 combination, but still got no response. the ports layout is quite different than old models. Does anyone recognise what these ports are? or how to make solar assistant work on this new model?