evi, So, eeeuh... well, this is embarrassing. :ms_embarrassed:
I found something that does the network routing in an acceptable way for me and it wasn't what I planned or even expected. On the other hand, I suppose it isn't shocking if you know me either.
I had to let go of the network port aspect, but the visual is strong and it shows me what kind of cables run where.
Thank you to https://tennessine.co.uk/metro/