IBBS Wiring Questions

Does anyone know what that symbol means circled in red in the attached pic?

I'm trying to figure out if my IBBS backup battery is staying charged automatically or do I have to have it turned on to complete the charging circuit.

Thanks for any help!

5 amp circuit breaker.

5 amp circuit breaker.

Click to expand...

Ahh. Now I feel dumb because that's obvious. Thanks