We have just started to install the newly acquired original swell shades
on our W 153. The "open" command is on hole #1, we know how to connect
that.The cancel is supposedly hole #4. It appears that hole #4 probably
cancels other things as well. The question is "what else does hole #4
cancel ?",  We need to know so we can pick up the signal from one of
those tubes. Or maybe we do not understand how this is supposed to work?