I was initially puzzled about the switches also, but the cabin kit installation manual shows cold climate (i.e. pilot) is on the brown wires and the on/off splices into the green. I found the WSK100/200/210, WSK300, and WSK-MLT all use switches that run off red/green/yellow and seem to use some protocol to indicate fan, pilot light, on/off, and other features using just those three lines. That's hard to tap into, but the cabin kit is obvious: it's just SPST switches tied into particular lines.
As for abbreviations, M1=Home automation, K015N=3VDC regulated power supply, ELK924=DPDT relay with trigger.
I will contact my local vendor and talk to a qualified technician. But, at least I have something that makes me believe my goal can be implemented. Thanks.