Audio Systems: stereo to caravan, caravan owners, fuse holders

Question
wanting instructions on how to hook car stereo in a caravan please.

Answer
You and 1,000 other caravan owners :(
I do not 'teach' installation for obvious liability reasons, but one of the other techs might be able to walk you through it in a manner that 'may not' involve a potential fire incident.
You will need a meter or at least a 12v test light, some 'belcap connectors' (available at autoparts store), some wire, fuse holders and fuses along with some wire cutters/crimpers.