This
is the rather complicated grounding cable for the roadster.
The heavy wire goes to one of the 3 bolts that holds your
alternator (or air pump on later cars) on to the side of the
engine block. The small wires run to the frame, body (use
the regulator screw) and the extra one is for the alternator
if it is mounted on the passenger side.
Datsun
Roadster Parts from Rallye Enterprises, Ltd.

