Here's a video of a 55" for business LG wallpaper tv.
Around the 2:30 mark, they show what is in the box. The actual display has a cable that is 18 to 24" long. Then an extension cable is plugged into that then the box. Idk about the personal use, but apparently for the business model. It can be mounted upside down, or in portrait, so that the box can be mounted above the display.
