Those are hydraulic valves, not switches. Most likely closing one or the other will prevent a slide (or jack set) from operating. On my old BH 3670, I have four hydraulic slides and a similar valve for each. Handy if you’re doing some maintenance and only need one slide open to get around inside.
On closer inspection of your last photo, one is marked B and the other G. Might be Bed and Galley.
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