Master disconnect, what does actuator mean?

I have a new Z from this fall. I was just working on it today and I see that the master disconnect in the front compartment has two different options. There is OFF and ACTUATOR OUT. What is the difference between them?

I looked and mine has this and I have no idea what this means.

Will the knob rotate from OFF to “actuator out” ? Its likely a dual label for same functionality. That switch, in front compartment, removes the battery from everything.