You could just run the wiring youself. Im talking about the 1 big RED wire. Just put it in parrelle with the existing one. Cant see that taking longer then 2 hours.
BTW once a lead plate battery is left completely dead, the plates oxidize, like rust, it will never be the same. You could try charing it steady for a few days to burn off some of the crap on the plates.
-Steve
