>| Crawl *under* the bus.  This is probably the wire that attaches to the
>| bottom of the thermostat housing, just above the (no. 3?) exhaust pipe.
>|
>| Best viewed by looking from below.

        On a mushroom looking post. It is on the front (using front as front
of the bus) side of the thermostat housing and can easily be overlooked as
a "connector".

dave