I didn't realize they have you keep the factory tweeters and rear speakers. Wonder why they have you remove the A-pillar when not replacing the tweeter. Even more interested to know how it turns out now. Good luck!
Yeah they have tweeters you can purchase that would work well for the application, but their preset DSP tunes are for stock tweeters with their Audison mid woofers. And their amp/dsp treats the tweeters as separate channels for time-alignment/equalization so they need a separate connection point rather than being tied into the door speakers with an inline crossover. Or at least.. that's what I could figure out.