I see on the floor plan that KZ has a "Closet/TV shelf". I don't know anything about the Sportsmen line. Does KZ mean you should be using a TV that sits on a horizontal surface or they mount to a wall surface. On our KZ, in the bedroom they have a sheet metal backer plate behind the luan plywood (common method) and it is marked with a sticker on the wall.
I would try sending KZ an email. I've done that a few times and it may take a day or two for a response or longer this time of year. Perhaps your dealer may know? They aren't always a wealth of info. tho.
KZ's website doesn't say if the framing is aluminum or wood, but I'm assuming wood. If there is no backer plate, you can't secure the mount just to the luan plywood and need to secure to a couple of studs as above. The weight of a TV plus a mount can be around 20 lbs and it needs to be well-secured. How is the end wall of the bunks constructed? If just one layer of luan, you *might* be able to mount a piece of 1x4 solid wood the entire width of the bunk wall (either side) then put in some screws through the luan into the 1x1 corner pieces to re-inforce the luan.
To find exterior wall studs, look for staple holes in the luan, try a stud finder (may or may not work) and/or try tapping on the wall with a hammer (carefully). Wall cavities are typically 1" thick plus 1/8" for the luan. I would drill small pilot holes using a bit with some tape wrapped around it for a guide.
There are articulating mounts with a locking T-handle on the botto like the Mor/Ryde makes which is excellent. You may find a non-locking one will work if you tighten up the joints. Our KZ comes from the factory without a locking type. You can always install velcro strips to secure it for travelling.
Looking at Vlopdapp's photo, maybe you could use a vertical piece of wood that rests on the shelf to take vertical load and then if possible, secure the top to a rafter. If you can secure it to the shelf surface, you could avoid having to attach the vertical piece to a rafter. Another possibility might be to run a vertical piece of wood (1x4?) down inside the cabinet towards the bottom and secure it well inside. The top is very likely just held on with some screws from underneath the shelf surface and you could remove it to cut a slot for the 1x4. The 1x4 could then just rise up out of the cabinet enough for the mount.
Another possibility would be to mount the TV on the end wall of the upper kitchen cabinet. You'd need to extend co-ax over there. You can run wires in a ceiling cavity and I've done it a number of times now.
