wiring jvc stereo to leisure battery

ive got a hiace mitsubishi conversion 1993/4, with 2.8 diesel auto. im trying to work out the best and perhaps not the most difficult way to wire my stereo to the leisure battery. ive laid a cable to a fuse box in the back which is connected to the battery and to the 110volt converter, on the live side with a 15amp fuse added. but there are a miriad of other wires sprouting out of the back of the stereo and i dont know what to do with them. can someone shead some light on the subject please?regards tom