you could wire them to the woofers but that will do two things. First it will make your deck run hot and possibly go into a thermal protection mode but its not that big of a deal. Assuming its a good deck it should shut down proir to doing any damage but you run at you own risk with a cheap deck. The real problem is that you need to take the bass out of the signal or that tweeter will sound like poo. To fix this you can go to radio shack and buy a pair of 1000 microfarad capacitors and just stick them on one of the wires going to the tweeter.