It's nice to know that you're adding something to strengthen the TV laterally. I learned a new word for use with big flatscreens. It's a verb: taco.
"Don't pull too hard on the sides of that 4000" inch TV. We don't want to taco it, you know."
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw