What is the thought here? To bypass the isolator and have the rear batt act as an aux with the crank?
You'd be dealing with a noticeable voltage drop from the rear batt in that arrangement (unless you're running 2/0 cable or some such). Not sure if it would cause issues somehow... maybe even...
I'm running the 80A stocker on dual 27 group and wired the winch to both batts - +to aux and -to crank.
SuperWinch10k
And hand throttle.
Haven't had to use the hand throttle for winching as the headroom across 2 batts provides pretty good run time. The longest time I've run the winch was...