MatthewI don't know what's your concept, but this is what I've done without modifying any wirings. These 3 cables is all you need, plus antenna pads of course. Remember to monitor battery capacity somehow, popular hobby tester works fine, miniature LED voltmeter as well ...
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What are you using to get the 6 cell balance info from your batteries? (Balance connector) Or are you just supplying 25.4+ volts to the circuit