At 10:04 central time, a Cessna T210L was damaged during landing at Addison Airport. The pilot was not injured. While on a 1.5 mile final for runway 15, the pilot reported to Addison tower that he had an electrical fire with smoke in the cockpit and declared an emergency. Prior to landing, the tower advised the pilot that the airplanes landing gear was extended but not fully down. The pilot landed the airplane and it came to a stop on its belly on the east side of the runway. Examination of the cockpit revealed that the fire originated in a wire bundle under the instrument panel on the copilots side.