Sorry, no pictures handy, but I just put a TV on an exterior wall on our unit and the dealer warned me not to use bolts any longer than 1 1/4". I must admit, it's a scary feeling drilling not an exterior wall. Use a stud finder to be sure the backer plate is where the sticker says it is - ours wasn't.
Rob & Kelly, Bella & Brady (Miniature Schnauzers)
2016 Eagle 323LKTS
2016 Ram 2500 6.7L CTD
2015 White Hawk 29REKS Summit Edition (Traded)