I am moving my two 100 Ah Li batteries to my pass-through on my trailer and adding a SmartShunt. I intend to used the same wiring route as the manufacturer--from the tongue battery. I need to buy new wires, as the original wires are a wee bit too short. The original wires are 8 awg but I'm changing it to 6 awg. Will this be a problem? and Do I use the same gauge wire to the Smart Shunt? I also intend to connect the batteries in parallel with 2/0 wire. Is there anything that I'm missing here???