There are a few ways to go! I wouldn't recommend connecting it directly to the speakers, unless your head unit is shot. First look to see if it does have AUX in, that would be the best. You can also get a fm modulator off of eBay or something, not the best sounding but it is better than a tape adapter. You can also connect the output to a amp, or a CD changer. I went with a FM modulator, it is the best choice for the money.