8 amp circuit breaker next to Master Power Switch

[apdriver]

2013 Cougar. Would like to know what circuit this breaker protects. It has a 10 gauge red on one pole and a 16 gauge purple that’s daisy chained off the master power switch that’s next to it on the other pole. Having an issue with the circuit breaker tripping.

[drainplug]

At only 8 amp, my guess would be electronics. Trip it off, see what doesn’t operate?