Nillaz

Ouch. You are gaining no benefit and doing your soundstage no favors by having the tweeters where they're at...if possible you should relocate your tweeters to the dash. Did you modify your door panel in order to mount the tweeters? i.e. is there going to be unsightly holes in your door panels if you relocate the tweeters?

The stock locations are the plastic grills in the corners of your dash. They can be easily removed by prying them up...if you don't have a clip removing tool you can use a small flathead screwdriver but try to be gentle to avoid chewing up your plastics. Personally I wrap the tips of screwdrivers in electrical tape if I need to do this when I'm not at home with my tools. Underneath the grills you will find your stock tweeters. They are secured to a small square plate held by 4 screws. You should be able to reuse the plates to mount your new tweeters by removing the factory tweeters, though you might want to make your own or have someone else fab you a pair in case you ever want to revert to stock. Don't try to utilize the existing factory speaker wires....run fresh speaker wires to wherever you installed your crossovers.

Hope this helps a bit. Good luck!