Well, I found a solution to hiding the wires from the headrests from a webpage where someone installed headrests in a Nissan.

After you pop off the seatback, reach up and squeeze the clips that hold on the plastic posts that the guide for the headrest post is on.

You can slip the wire down that opening and route the wire around the insideof the seat back.

The headrests are taller, so its unlikely you will have to extend the headrests. I did not leave alot of slack in the wire for that reason.

When you push the headrests down, the wire is hidden from view.

I can take photos of anyone needs them.