Big 3 with 2 batteries??

Do a typical Big 3 install to one of the batteries then simply wire the other one in parallel (bat 1 positive to bat 2 positive; bat 1 neg to bat 2 neg) then ground both the batteries to the chassis (utilize the same point to avoid ground loops).

 
go from battery negative to battery negative. and use the shortest amount of 1/0 wire you can. its the best way. and if you feel like it you could also go from each battery to the chassis then go negative to negative. IMHO its the Best way to do this.

 
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farmerehsan

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