Have no idea where yours is located. Ours was located close to the coax receptacle, but it wasn't marked. I had to tap on the wall to find it. Mine was big enough to accept a 100x100 VESA mount. Because of its location height a 32" T.V. was the biggest it would accept. Ironic thing is, after all that work, we never used that T.V., and we wound up pulling it out and leaving it at home.
'07 K3500 Silverado LT Crew Duramax (LBZ)
2016 Salem 27RKSS
1984 CHEV SCOTTSDALE K20 2GCGK24J0E1XXXXXX (Chevrolet Legends-Class of 2019)
"...exhaust fluid? We don't need no stinkin' exhaust fluid"