rockford fosgate dual isolator alternator

The dual output posts can be left seperate with one going to each battery or you can leave the jumper in place and run a single larger size wire to both batteries if they are next to each other. I would see if the external regulator has dual voltage sensing wires. If so I would find out if any one particular one or both need to be connected to the battery. My opinion is if I had both batteries next to each other, they were the same type, brand, and purchased as a pair and I would not allow the batteries to get to low to where I couldn't restart the engine and I wanted to run one larger gauge wire instead of two seperate more expensive runs of wire, then I would run it with the jumper. 

Jim