Solax inverter meter connection

I have recently had a Solax solar system installed, with a Solax X1 3-6kw inverter. However they did not install the connection between inverter and extra solar meter. So I cannot see my import export data. I know there are a couple of ways to do this. One with the CT sensor connection and the other through the RS485/meter interface. I’m looking for some advice on the best way to accomplish this feature. As I would prefer to be able to access this data. Also I am looking to switch energy providers and without this data I am unable to apply for the Export guarantee payments for the energy I export to the grid.
Can the energy provider use data from the CT sensor connection. Or would it need to be done via the RS485 meter interface. In which case, which meter does the RS485 connect to. The existing consumer smart meter, or the additional meter to which the inverter is connected before the consumer unit.