What if you plug in a jack, cut the wires and trace the left, right and shield to where the ribbons plug with a multimeter. Then maybe you can solder wires near the ribbon.
Looks like that would be my only other option...I'm still going to see if maybe I can dremel out some of the trim and fit the charger and 3.5mm in and fit it in the dash...who knows maybe I won't even have to open the tablet up and do all that!