[Farmall] FARMALL H BATTERY DISCONNECT

[Richard Pope]

Long time reader, first time post.
I just bought a restored 1950 Farmall H.  Three days after bringing it home from Phoenix, AZ, I took the tractor to it's first event.  Wasn't I surprised when it had a dead battery and I couldn't even get it off the trailer.
I have purchased a NAPA battery disconnect switch, part # SW181.  The H is positive ground, which is new to me.  My 1953 Super M is 12 volt negative ground.  Anyway, which cable do I install the switch on?  The positive side of the battery going to ground?  I want to be able to park the tractor for several weeks at a time and not have a dead battery when I go to start it.
Thanks,

Richard Pope
Apple Valley, CA