Gave up about 3 hours later.
I had a Tassie trip planned and basically ran out of time and now with family commitments I won't have time to settle back down till after Easter to continue with the install, I need to build a little stand so the unit can sit on it while figuring out the wiring (zero instruction), I might just give it up altogether and get someone to install it.
If you want my advice, get some auto-electrician to supply and install the unit (either Teyes or not, doesn't matter). Where I am they all don't want to touch it as they are not familiar with the 'brand'.