I'm glad to hear that it is still fairly cool where you are.

For the terminals I would say put it in reverse and see which one is grounded,
then take it out of reverse and see if it is then not grounded. That is the
one for the backup light. (This is a lot easier to do with the tranny out!)
My guess is that if the wires are properly hooked up it will be the black one.

Although the tranny is pretty heavy, in my experience the jack is more trouble
than it is worth. If the clutch plate is properly centered the stabbing is
fairly easy and quick. Be sure the tranny is in gear so that you can line
up the splines with the back flange, heave it up and stick it in, turning
the flange until the splines line up. I usually lift most of the weight with
my right hand and turn the flange with my left - I'm right-handed. Usually
takes me a day or two to recover from this but fortunately I don't do it often.
If you have a kid or a grandkid around who doesn't mind getting dirty it can
help a lot. Little brothers and dads also work. Same system works with the
M410, just more awkward because the bellhousing is already on it.

If your helper is claustro you can sometimes put a rope down through the
shifter hole (on early models where the hole is forward) and just get them
to lift it with the loop in the rope so you only have to guide and stab, not
lift.
--
George Downs Bartlesville, Heart of the USA!