I have been having some battery issues not quite resolved yet, but it made me think that I could rig up a 2nd battery so I wouldn't get stranded anywhere. I would like to put all electronics of the truck on a 2nd battery and run my main one just as a starting battery. I have 2 batteries and a stinger sr200, and all the wires.(from an my bass days). How would I hook this up? 2004 Chevy avalanche z71.