don't know if it helps..
but here's my power distribution and harness:
(yups is heavier than some quads!)
10 AWG from lipo to power board, 10 AWG from powerboard to first split, 14AWG from split to esc, 12 AWG from first split to second split.
it's for a H shaped hexa that will become a very heavy lifter in the future. (now "just" 3KGs uaw) at the moment it has 6X 30A esc's, but that will become at least 60Amps per esc in the future. (the aim is to make a very fast and responsive H-hexa with auw of around 8-10KGs.
(money makes it "in the future" big esc's and big motors do cost plenty
the power distriboard is "modded" and the tracks are 5MM wide and 3 mm thick..
it now has 2 lipo connectors and 2 strands of wire harness (ow and 4 small connectors for misc usage such as 5V bec feed for FC, 12V out bec feed for downlink and such shenanigans..