Jonesy

Hi all, Just bought a 1996 2.8 V6 Ghia X & was looking around r/n/s rear light access panel & came across a co-axial aerial cable. I would like to know if there is an AV option & where this cable is likely to go. Also the lamp has gone in the back of the odometer. Is this a simple lamp change or does the odometer need changing? Many Thanks