Let me see if I can help a little. Mine is a 1985. Here are shots from when I recently gutted the wiring and modified my car.
A shot from behind, cigarette lighter on left:
at a slight angle:
the defog switch close up:
The Black with Blue striped wires are the gauge/dash illumination power. They are daisy chained all through the back of the back of the panel.
I hope this helps!
Mike