yes the stock battery is up by the firewall and is gunna be a pain in the ass to work with
why do you say it could fry the alt? puttin to much stress on a stock alt?
on my burban i have two runs of 1/0 coming of the back of my alt one two each of my D3400 under the hood with no problems (but its a 300 amp alt.. )
Well, they are common points, true. But here is my reasoning. When you have a run from alt. to batt 1 to batt 2, the alternator charges them in sequence. For example, the alt will charge your main battery first...then when it is charged, it will move on to your bank battery and charge it. This means that it may take longer to fully charge both batteries, but it will be a safe and consistent draw from your "STOCK" alternator. Now, if you have a run from your alt directly to each battery, then your alternator is having to work double to keep a charge on both of those batteries at the same time. It would take half the time to charge the two batteries, but like i said, your alt is trying to charge them both at one time, therefore it is working hard. If you take into equation both batts are drained one morning, you get in the hoe, and start bumping, then you got even more strain on that "STOCK" alternator...making more chances for magic smoke. This is just my reasoning behind all this...if someone sees flaws in it, please correct me...don't eat me alive.