Tweeter crossover for 2nd gen s?

I know there s a resister soldered to the stock tweeters cause when I swapped them out I saw them. It s my understanding that resisters used in this way are for attenuation, but the way it s using 2 channels to drive both door and dash speakers makes me think there should be a crossover somewhere, (unless they are really more like a fullrange than a tweeter), which is much more of a circut than just a resister. It seems to me that there should be a crossover somewhere. Anyone have a clue where they are assuming they even have crossovers?