Flush-mounting Hybrid Audio Unity tweeters - how???

[DDFrontier 10+ year member]

OK, am I stupid or what? The ONLY mounting hardware this set comes with are a bunch of screws and speedclips. How do I flush mount the tweeters? Just cut the holes and press them in or what? I'm used to tweeters having some type of bracket on the back that cinches them down tight against the panel surface - these don't. There is no hole cutout template either. I'm guessing I need to cut the hole just perfect so they are a snug fit? Any help?

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[wenn_du_weinst 10+ year member]

hole saw and press fit.

 

[DDFrontier 10+ year member]

Thanks man.

What size hole saw though? Spec drawing shows cup is 49mm wide? That's 1.9ish inches. WTF?!?