Takes a bit of work and customization to alter the airframe connectors. It can be done but the risk of a permanent failure error is much higher. Easier to change the battery connector.
Regarding those 8awg wires, which do you think handles current more efficiently, the Zippy’s with the heavier gauge or the Yuneec’s with smaller wire? When moving current, surface area matters.
It’s part of the reason a pair of 5000mA batteries provides as much (or more) flight time as 3 4000mA batteries.