Reinstall Acer Aspire ES1-731 laptop button?

I removed my laptop key a few days ago to clean it. But I do not know how not to install the part again. I have made a picture of the different elements. I really hope that someone can help me, that would be very great.

Thank you in advance,

Milaot

I.d.R. That's enough, if you press them in. At least that's how it worked for me.

The button 1 because of the round ring on the back purely, as would have to be notches so that the ring only fits into a properly pure, the square underlay would then have to be placed on the ring, this should probably einklinken only in one position and then turn the key and click on the keyboard.

P.S. It could also be that the square underlay on the keyboard and then click the button on it. It's always hard to say, with me the parts looked a bit different

Thank you! I will try it.