Rick Jasnica

I have a 2015 Ford Edge and need to replace the 3rd brake light on the tailgate. I dont know if it comes out from the outside or from the inside. I have tried to pry it loose from the outside but it doesn't budge! Also, I tried to access it from the inside and removed the panel but see no way to access it from there either.. Any thoughts would be appreciated, just want to replace it with an OEM part