All fused at less than a foot from each battery JJ - I know 0awg is approx 50mm but there is a lot of ambiguity in labeling - shok label this as 0 gauge but there cable is CCA not OFC so it may be an 'equivalency' thing.
Probably is overkill but for 4 meters or so of cable run what's a few dollars more? (Besides it looks cool!)
Thanks for the kind words all