Sounds like the TV is screwed onto the steel frame using the same holes on the TV that would be used if you were to mount a bracket onto it. Since the Tv cannot be lifted up there is no bracket there.
Get a mirror and look behind the TV.
My Cambria had brackets mounted to the side of the TV with moulding hiding those brackets. The rear holes that come on the TV were used fasten this bracket to the Tv.
I had the brackets that hold the nose cone to the roof of the cab break so I was in there a few times.