I just purchased this set of component speakers from woofers etc. and they upgraded me to the 25mm tweeters for free ive never installed a component system. These speakers are going into a 2000 maxima speakers will be played on a kx650.4 with a re audio 15" sx and a kx600.1. How do the crossovers have to be set and how to mount the tweeters in the stock location?