Thanks to Moose on TDR who paved the way.

Trick spot to put your controller if you don't use your ashtray.

The ashtray assembly pops out by simply reaching under the top edge
and pulling it out.

Drill a hole and elongate it approx as shown. The larger part allows
the TST harness connector to get through. The slot allows the wire to
move without binding when opening and closing the ashtray.

A little crude.. Drilled a hole then used wire cutters to cut the slot. I used a
disposable box cutter to trim off the sharp edges.

Put a strip of 3M double sided tape accross the bottom.

Stick it in with the top right corner resting against the joggle in the ashtray.
This will  keep it from leaning back when pushing the buttons.

 

Here's a view showing the wire exiting the rear .