i think it works now… i just nedded to wait a bit… let me just restart the full node and se if everything works now. THANKS 
Ok, so you found your 90TB, thats cool;-)
That was really all to https://github.com/Chia-Network/chia-blockchain/wiki/Farming-on-many-machines, haha;-)
To start/stop the harvester machine or configure extra plot directories in config.yaml you only need terminal access to the harvester-machine. With a keyboard/mouse and screen attached to the harvester machine, but also possible to ssh into the harvester from your main full node system. I get it both systems are a bit apart so maybe handy.
Just need to install the ssh-server on the harvester-machine as on the full node machine and log in from any another machine on the local network, from terminal on ubuntu or powershell on windows:
ssh milo1@192.168.8.131
enter milo1’s password and you’re in;-)
exit after use and you’re out.