Super Tracks (blue) will automatically play through your deault synth, in my case Coyote Forte. Thats it, nothing more to do. It just plays like any Midi track on my system via the default synth.

If I want to redirect to SampleTank I Right click on the track and select "Select HiQ Midi Patch...". This will then automatically load the predefined SampleTank selections. Very simple.