Earlier
style cable. This one has one extra wire to run to the
body. It has a female "bullet" junction connector on
it.
Some
cars connect this to the frame; some to the engine
block. If you connect it to the frame; make sure their
is an equally heavy cable connecting the frame to the
engine. In the early days these could be found over by
the starter motor. The early cars originally connected
to one of the bellhousing bolts that hold the starter;
and ran over to a nut welded into the frame. It
doesn't matter where; that was the best location to
ensure the starter was properly grounded. If you've
ever tried to start a car and noticed either it
wouldn't start or that the throttle cable was glowing
orange; that is a definite clue this extra ground
cable is not doing its job or is missing.
If
you connect the ground cable to the engine; make sure
there is about a 10-12 gauge wire running from the
body of the car to the frame; and from the frame to
the engine. One of the alternator attaching bolts if
the car has a right mounted alternator and one of the
regulator mounting screws are good spots. Always
ensure both locations are clean and bright and dry and
tight. Bad grounds I think are the reason for 50% of
all electrical problems; maybe more!