Can't get behind the TV

I am going to install a new HD antenna on my 2012 Cedar Creek 36B4. Looks like I'll have to get behind the TV, but for the life of me I don't see how to dismount it. It doesn't swivel or extend and is mounted in a cavity that makes it flush to the wall. Very little room for fingers on one side and no room on the other.
Has anyone with this model tried to remove the TV? Anyone have any ideas?