Bike battery to start power station.

[Joop E-Bike]

I have a power station Bluetti. I have some spare batteries and I like to use them to charge the power station if I have no solar power, in emergency cases .The power station has a solar inlet of 60 V max. The only problem is the batteries. Bosch and Specialized only can be activated to deliver power if they get a communication protocol by the third wire, does anybody have an idea how I can tackle this? And which wire this is on a Specialized or Bosch.