Shelly Window Door 2 Extension Plate for double window

I was faced with a problem of my grandma opening the window while i am at work and i would not want to turn the air conditioning remotely while the window is open. I wanted to detect if either window is open.

It is a dead simple model i know, but i wanted to make it easier for others cause i was procastinating on this for a week to draw it up.

Used 3M VHB tape, the very best double sided tape.