[TR] TR3 wiring harness

[Randall]

> Some component
> position changed too though I do not know if that affected the harness.

I'm guessing the change in control box position required longer wires at
that point.  Post-60K had it higher up, and mounted sideways; while the
early harness (at least the originals) is just barely long enough to reach
the terminals at the bottom of the old location.

-- Randall