EX3560 + extra tweeters...can this be done?

b_knockwood

I have the ex3560 component system in the front doors of my car. A buddy of mine bought the same system but only wanted the drivers...so he hooked me up with the tweeters. I was wondering how I would go about installing them and wiring them to my current system. Can just wire them up to my crossover?...and what type of load would I be putting on them? Thanks for your input.