Hello bovvv,
I recommend to use --root argument to define the path from the node to the network storage location.
To start the network processing, you need to open PhotoScan Pro in GUI mode on any connected machine, enable network processing in the corresponding tab of the Preferences window, specify host / root parameters according to the network server IP and path used to the network storage on the nodes.
Then prepare the project in PSX format and start the processing - PhotoScan will ask to use the network processing, if everything is configured properly, and you need to confirm it.