I am sorry, if you are relying on the extra battery cables to transfer power to the other cells, they have additional resistance, therefore using OHMS law voltage times current divided by resistance, you will have less current gowing to the othe cells if you connect both positive and negative to the same set of cells! Yes you have the same resistance drop across both sets of cells if one positive to one set and negative to the other set, but all cells will be the resistance and receive the same amount of current! But you connect the way you want to, I will connect the correct way!