So, I did everything like described by dawe now.
The speaker positions changed again (still not correct order)…but now fixed, no matter what order I set in the conf in the marked line in the picture below.
It stays the same but different than before.
Do I need to set the node.target 6 times like the console shows with pw-link -o ?
Just to be clear, I use analog outputs, not digital.
FR FL green Cable
RL RR black cable
FC LFE orange cable