That's the way most components work, some times you have to use the factory wires for the crossover input because running new wires into the door can be a mofo (or impossible without drilling). That xover will take the input from the amp and send only high frequencies to the tweeter and mid range to the driver.
Edit: If they're not damaged, you have a pretty sweet set of speakers there. If you get em properly installed I'm sure you'll be happy. I'd also suggest you pick up a decent amp for them bc most head units just don't have enough power for a good set of components