Moving the CD unit to the back was a pita... Gulp... no turning back now...
I traced the wires and ended up cutting them in front of the rear seat. I then doubled them back into the driver side rear compartment.
I have a microphone for the Kenwood, the recommended location is on top of the steering column, that sounds like a bad idea so I made a better location. I popped out one of the blanks in the upper console and routed the wire along the headliner, down the a-pillar and under the dash, concealed it perfectly. I'll have completed pictures coming up.
I pulled out my multi-meter and found that there are some unused slots in the glove box fuse panel. I found one switched ignition and one constant 12v source free! I have the wires all ready, 10amp inline fuses ready for tomorrow.
Besides the power I need to find a suitable ground. Last option is to splice a little more wire onto the MID plug so I can move it to the glove box. almost to the finish line!
So far I'm into this project:
$250 kenwood head unit
$19 Metra install kit
$85 PA-12DSP
I'm gaining bluetooth, aux inputs for devices other than Apple products, potential to upgrade to rear view camera and rear seat DVD entertainment. I still have the use of all 10 speakers, the DSP sound settings.