Optimum physical arrangement for series connection of high-current batteries
It's more likely to be a voltage concern than a current one.  In the first diagram, the voltage between the two adjacent battery terminals at the bottom is 384 volts.  In the arrangement on the right, no adjacent battery terminals differ by more than 144V.  

In fact, there is probably a better way:







simulate this circuit &ndash; Schematic created using CircuitLab

This way, adjacent battery terminals differ by only 48V.