@Cindy_og wrote:
Did you figure out how to take the back plate off ?
I am struggling to figure this out !
I understand your struggle. 
The directions enclosed were for a different model.
To ME, it didn’t look like the back should come off. However, there is a little insertion dohickey on the bottom. I put the tip of a small flat screw driver in there and twisted lightly. The back then popped right off, and exposed the magic orange button.
Hope this helps.