[Healeys] Starter Solenoid Question

[PhilRitten at aol.com]

I realize this is probably a silly question, but which side is the hot side 
 coming from the starter solenoid? One has a very heavy copper wire going 
to it  (I'm guessing that's that hot side). I'm replacing the pipe going to 
the clutch  solenoid, and don't the pipe to short against the wrong side.
 
Thanks,
Phil
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