Rack Mount LIFEPO4 wiring between batteries

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When I see examples of people's battery racks with wiring between batteries, I wonder why they do it this way:

https://www.mobile-solarpower.com/uploads/1/2/9/6/12964626/20220320-165103_orig.jpg

Would the current be highest heading into the wire of the last battery, and lowest flowing from the first battery? Are the wires they typically ship with these units large enough to handle a rack of 6 wired this way? I'm thinking a solid buss bar is the way to go, with equal length wires from each battery terminal so that the current flowing through each wire is low and equal.

Maybe I'm missing something?

 

[740GLE]

This is the cheapest way to wire up a rack, def not the best. If the rack doesn’t have means for a bus bar this still gets the job done.

Also many people have multiple banks of batteries not for higher current demand, just more reserve capacity, which this set up meets.

If higher current demand is what your after agreed, bus bars and equal length cables from each battery to bus bar is the way to go.