Yep, you were right, Scott, regarding the black/red wire from the
starter. I tapped into it by removing a short section of insulation
and soldered one of the leads to the switch and then applied 2 coats
of liquid insulation followed by wrapping the outer sleeve with some
electrical tape. The other lead was fitted with a ring connector and
bolted to the alternator output. A few zip ties to keep the wires in
place and a velcro loop to secure the switch up high in back of the
air cleaner and it was good to go. Sure beats having to run a wire
down to the starter solenoid!

Happy new year, volks!

Keith O.
90 Westy Syncro "VikingWagen"