Thanks for the responses. Put me in the right direction. I finally opened the panel to figure out what was going on. While I like the TV slide it sure is a PITA to work around.
There is indeed a single plug in the compartment with a 12V cut off. No second plug inside - it's outside in the dinette. But at least I found a plug (next to TV) for expanding. So I'm now playing around with the plugs trying to determine how I want the AppleTV installed
Thanks again for everyone's help.