I ordered another from the Bay and got it in about a week from China!
Now I have one for both the freezer and fridge.
Great no fuss mod that needs no maintenance. Accurate too.
Here's a pic of the back of the control panel and how I wired it into the switch p/c board. Note the pins I used which are powered only when the fridge is on.
For those with the humidity control option, I would think this is a separate p/c board next to the main switch board. You can see where this would be on the back of my panel.
edit: I take that back - I see on Silvers unit they are on the same board. I just checked all my pins to see which ones offered what I needed. No extra switch required.
I hope this helps those wanting to do this mod.