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Reversed polarity battery setup…


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When installing the batteries on my 252 SD this year, I very dumbly crossed the wires on the starter battery, but had the house battery connected properly. Turned on battery switches and attempted to fire up and nothing happened. Parallel wire got hot and started smoking, so shut everything down and corrected wiring. Found 2 blown 50 amp fuses in the engine compartment that were replaced. Accessories (Connext screen and switches) don’t come on upon turning key. They do come on after engines fire up. Basically not getting any power just off the house battery. Everything except for speakers (likely amp) seem to work when engine running. Anyone had anything similar happen? Aware of any fuses outside of the ones next to the battery switches and on the back wall of the engine compartment that would be worth checking? Any circuit breaker in the helm compartment?