Hi there! I'm trying to connect a relay to two buttons of a coffee machine to control it remotely.
When I opened it up I discovered that the two buttons are placed on a separate mini circuit board.
As a more or less total newbie the layout confuses me a bit. I tried to determine in which way a button press (small cup, large cup) influences the current flow using a multimeter but I still do not know how to connect a relay correctly.
If someone could give me a hint and maybe also accomplishes to explain me what the white squares are for I'd be truly grateful!
I've attached two photos (front,back) and three sketches of the currency flow without any button pressed, the changes when the left button is pressed and the changes when the right button is pressed.
Thanks in advance!