Edit: I just saw your other post, where you say you have a hatch.
You have other options then, try and sell on the GTO268s at a loss on ebay, keep them yourself for some point in the future where you might want them, fit them as is and dont worry about the tweeters or try and separate out the tweeters from the speakers you have.
Id be tempted to do the latter, but it will require a bit of rewiring and soldering.
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