Hi Andrew
I think you have 3 sockets in a row next to the TV sockets.
The yellow is a composit video output and the other two are stereo audio L & R. If you have a LCD flat screen TV you may well have this type of socket on the rear, if not, you should be able to get hold of a lead to run from the phono plugs to scart or an adaptor consisting of a scart plug with 3 phono sockets on the back. The van should have a suitable phono to phone lead supplied, but if not they are available from Currys/Dixons etc.
I have just ordered a 2006 Bessacar 625 and so would be interested to hear your views on your new van. What was it like on delivery, how is the quality of finish and overall, are you pleased with it?
Happy vanning
Clarky.