RovyVon GS15 remote switch signaling

The RovyVon GS15 remote switch has two buttons: a large one, and a small one for the visible override. It connects over a Crane plug, which only has two contacts, so the light tells the buttons apart by resistance:

For comparison, a standard Modbutton Lite is a dead short, effectively 0 Ω, and the GS15 treats it like the large button.

I doubt anyone else will ever need to know this, but if you do, there it is.