I have had an email exchange with Ron Baker at Thor and he is providing input on accessing the ice maker line. I have attached a picture of the fridge and one of the two top mounting brackets. I have asked Thor what type of adhesive pad is used to attach the top bracket to the fridge. According to Ron Baker it is "just a sticky foam pad to keep it from scratching the fridge, nothing special."
So it looks like the two lower brackets keep the fridge from rolling out of the cabinet while to two top brackets keep it from bouncing up and down.
Now that is interesting. The pictures have the proper orientation on my computer but were rotated when attached.