New Device: JSON for imitating a Orion XS

[ak68-hub]

Hallo together,

I´m using the following JSON`s to imitate a Battery/ Solar at Venus OS using the following scripas:
https://github.com/mr-manuel/venus-os_dbus-mqtt-battery?tab=readme-ov-file
https://github.com/mr-manuel/venus-os_dbus-mqtt-solar-charger

enphase/battery:
{
"Dc": {
"Power": 0,
"Voltage": 15,
"Current": 0
},
"Soc": 100
}

topic/path/to/dc/pv/json:
{
"Pv": {
"V": 21.34
},
"Yield": {
"Power": 0
},
"Dc": {
"0": {
"Current": 0,
"Voltage": 14.98
}
}
}

this works perfectly:

Now I would like to imitate a Orion XS (mqtt-dates from a votronic booster !)
Does anybody know, WHERE (path ?) and HOW (format ?) to send the JSON-File ?

I´ve tested that- but it seems not to be correct:
topic/path/to/dc/dc/json
{
"Dc": {
"0": {
"Current": 0,
"Power": 0,
"Voltage": 15.03
},
"1": {
"StVoltage": 14.76
}
}
}

How can I add a device manually ?

Must I use the https://github.com/victronenergy/dbus-flashmq for that additionally?

Thank you
Andreas