Tweeters. General question

[KAiRO]

This is just something that sorta popped into my mind. I have some experience wiring amps and connecting subs, but where do you plug the wires in for a tweeter?
such as in this linkhttp://www.cardomain.com/id/bigred93explrer
Do they get plugged into existing stereo wire from the front/rear speakers? or plug into the headset

Thanks,
Nick

 

[bigred93explrer]

thats my setup that you are looking at. The wires run down the strip where the seatbelts are>underneath the step panel by the carpet>crossovers are tapped into front door speaker wires. Does that answer your question about the wiring

 

[KAiRO]

Yes it does, Thanks a bunch. I think I might just do that in my X. Looks like a decent spot to have them.