I need to replace an HDMI cable that connects from the Genesis Technology entertainment center to the TV in the living room. I see no access panels to allow me to access the cables easily. When I take the TV off the mount, there is a hole for all of the connecting cables so that only those cables are visible. The other ends of the cables are hidden in the wall somewhere. How did they connect the cables from the Genesis Technology center to the back of the TV? There must be an access panel somewhere.