i have a pair of 50AH batteries with bolt on terminals. i want to connect both 10A-20A cont charging wires across both batteries in series, and 30A brief discharge wires onto one battery. max imballanced discharge 50AS over 2hrs. i hope normal charging will restore ballance. max discharge either battery 45%. terminals normally only removed when changing battery. both circuits will have connectors between battery and loads. pls indicate suitable wire sizes, ring terminals, and charge line connectors [XLR?]. i will use anderson connector for 30A cct.