When displaying a wall mounted TV, you need to figure out what to do with the cable box. Setting the cable box on a TV stand under the TV somewhat defeats the purpose of mounting the TV, since you are still using a TV stand and thus the same amount of space. The best option is to conceal the cable box, which is done by running the wires under the dry wall to a location where the cable box cannot be seen.
Measure a 3-nch-by-3 inch square box space on the wall behind the TV next to the mount. Make sure you choose a location on the wall were the hole is covered by the TV. Draw an outline of the box on the drywall or plaster, then cut it out of the wall using a carpenters knife.
Measure a 3-inch-by-3 inch square box under the TV where you want to set up the cable box. Draw the square on the drywall or plaster, then cut the hole in the wall using a carpenters knife.
Connect a coaxial cable to the "Antenna In" port on the TV and feed the other end down into the space behind the TV. Continue to feed the wire down until it reaches the exit hole under the TV. Pull the cable out through the space.
Connect the cable to the port labelled "Cable Out" on the cable box. Place the cable box where you want it placed and concealed; a cabinet or small shelf would be ideal. Place small decorations in front of the wire to keep it hidden.