Mounting tv in outdoor area

[diesel_doberman]

Wanting to mount a tv in the outdoor kitchen/entertainment area. The tv mount shares a wall with the bunkhouse tv mount. I am wondering what length screw will not penetrate into the other entertainment area. Anyone know the depth for these screws. Thanks.

 

[Rodknocker]

when I mounted mine I removed a electrical outlet cover on the same wall and measured the thickness of the wall