ADAT into Reaktor (as a plugin within Cubase 9.5)

I’ve been trying to find a more streamlined and easier way of routing my Expert sleepers ES3 and ES6 via ADAT (through a MOTU Traveler) into Reaktor as a plugin within Cubase 9.5.

The only source i can find is this one from 2010. It mentions you have to setup a 5.1 group to get Reaktor to recognise the ins/outs.

It’s painful to watch and is cumbersome to get it all working. Nevertheless, it does work but seems strange Native Instruments or Cubase has not provided a more up to date method. Surely there must be an easier way 9 years on.

Has anybody else come up with a better way?