I have a 2012 Montana with probably the same type of lift as you. If not identical, it is likely similar. Keystone seems to use a technology forever.
Here is a picture of the back of the TV (and lift) when raised. There are two brackets bolted to the TV using its standard holes (6mm as I recall). The bracket "clamps" onto the televator ladder frame. Remove the clamp bolts and lift the TV off the ladder.
This picture is of the ladder frame after the TV has been removed. Mine was easy to access as there is a window behind it. I don't know what access you have in your FL model.
Lastly, here is a pic of the bracket being installed on the replacement TV. Ideally the bracket holes (of which there were many as I recall) match up with the holes in the TV.