Decided to grab some pins and connectors from Mouser, and made an intermediate harness between my idatalink interface, and the original radio harness, this routed the low level sound down to the amp, and the high level out back up to the front speakers.
I was confused at first, because the rear speakers have no input on the uqa+y91 lux amp, the sound is matrixed from the fronts only and there is no fader control available (I have some ideas there, but nothing done yet).
Even without that, I have full function of the original speakers, + the bose sub. If I were going for all out sound, I'd probably replace all of the output wiring to the speakers with larger gauge, but this seems to be sufficient for stock and stock replacement.
Highly considering buying a uqs amp to play with as well, just because. Not sure if I'm going to add d pillar tweeters, or the front center channel at this time but it wouldn't be difficult to do so
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