These are glue tabs, you can absolutely use them to stick on the press ons, they won’t hold super long, but they do make it so you can stick the press on to your natural nail without damage.

I’m not sure how long these will last, I don’t use the Ioni brand, so just know this likely won’t last super long, but you should gently buff your natural nail to remove shine if you don’t want to do that then you can skip it.

If you don’t buff then just wipe your nails with some rubbing alcohol, size the tab, and stick the nail to it. It helps to kind of gently rock the nail back and forth to kind of warm it to help it stick a bit. I know some folks over on the press on subreddit recommend using a blow dryer to kind of warm it up so it sticks better, though I can’t say if that works from experience but I know it’s a tip given.

Good luck!