You need to practice how to effectively communicate in a forum on the internet. Sorry to say!
Yaml file is still to configure
Which?
Wallbox is working (windows)
What does it have to do with Windows? Windows the operating system??
data from modbus to the mqtt Broker
There shouldn’t be any modbus to mqtt 
Modbus is probably what you want you want to configure in EVCC. Check the EVCC documentation for how to integrate relevant devices EVCC. EVCC will in the next step publish relevant data, including data received via Modbus, on MQTT.
Is there any Support Description?
For what?