Hi Flossy--
You have a similiar unit RV as mine.
My wooden plugs just popped out with a small screw driver. If they are flush mounted just drill a small hole in the plug and screw a screw into the hole and pull it out with pliars.
I'm sending you a link to the mod I made to my rear TV. Make sure you go all the way to the end of the second page because I changed it again, later.
I see some new model coaches are using the window space as I have for TV installation. It gives you more storage space in the bedroom and the girls love that. I don't use that window anyway. You can still use it for ventalation.
My works great now.
Good luck on your update-------
Max
