with spare plug(s), modified in-dash radio cages and power supplies you could have a 'jack' at every point you need.
I would be more that willing to pull a wire harness from a hole in my dash and plug it in the back of the headunit and then slide the whole thing into the dash.
I need this thing(riocar) in three cars, maybe four. and 4 channel out to the home amps would be nicer than 2
the horrible truth is that I'm having so much fun with this thing, that I've never even seen the cage for mine, much less it's plug. It could be missing for all I know.....it's still in the box. I can't bring myself to un-plug it from my computer at home.