I have the big motor & the console gauges/switches hooked up to the starter battery .... the trolling motor & my Hook 7 hooked up to the trolling motor battery .... and the Livescope & Garmin 93sv UHD unit hooked up to their own separate battery.
Starter battery is a series 27 .... TM battery is a series 29 .... LS/93sv battery is a 68ah AGM