I think your outlet is too high in relation to where you will want the bottom of the TV. Please view the LG video, which is (somewhat) helpful. It does a great job of showing how cables track within the display channels they've created and those channels is where your wall box MUST land. So, if the center of that channel is 12" below where the mount will be located, then you put your mount 12" above the wall box. Which, I think, leaves the bottom of the TV too high. But, that's just my opinion.