You'll want to connect it to the aux port on the left side of the back-side of the Overture as your looking at it from the front. Your local dealer should be able to get you the right adapter piece which would have two analog RCA connections on one end and the multi-pin connection on the other to go to your BeoSound. Hit the aux button on the front and you should be good to go. Your TV will have to have a RCA monitor output and you will have two volumes to consider. I hope that helps :)
BV7-40 MKIV, BeoVision Avant 32, BeoVision 8-32, BeoLab Penta MKIII, BeoLab 6000 x 3, BeoSound 9000 MKIII, BeoLab 7-4, BeoSound 4000, BeoPort, BeoVox S45-2, ML/MCL Convertors, A8's & Form 2's.