Redirecting audio from Bus1 to harmony plugin

I have just installed the Antares Harmony Engine as AU plugin. The software comes with an LSO file to show people smarter than me how to set up everything.
The vocal track output is Bus1. The harmony engine is on 3 software instrument tracks with midi data (the 3 harmony parts)
I have tried to sort out the environment, but I'm not able to copy the setup. I'm unable to figure out how they route the audio from Bus1 to the software instrument tracks!
The plugin documentation just refers to the Logic documentation - and I'm stuck
Thanks for your patience
Stein Arne Jensen

Thank you, thank you, thank you!!!
I don't know why I bothered to sigh up at www.logicprohelp.com
I've been waiting for a helpful answer from them for more than 30 hours - so far in vain. Here it only took 1/10th of that!
... and finally, for the first time ever, am I using the sidechain in Logic
It works perfectly!
SyrinxGC

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