the power chord from the back of my product was accidentally pulled from the box. it is all still in tact but i need to know which wires are positive and negative?i do not want to cut the chord any further and would like to solder it back from the inside.the white & black one run from the fuse and the other incoming black runs to the red one.if theres any way possible to forward this information it would be highly appreciated.i really enjoy my boston acoustics system and would dislike the fact of having to discard it.thank you.