I am attempting to install an infinity Basslink into the trunck of my 2000 LHS. There is an option, per the Basslinkinstructions, of splicing into the front only or the front and rear speaker wires, which are easily accessible at the amp in the trunk, but I do not know the which wires go to what speakers. Is there a diagramyou can provideor is ther a better way to install this unit, such as a preampadapter.