Yeah you’re totally right. It was quite easy to take off but much harder to put on. I think I found the latch, so i tried to take some pictures, but I would say it’s not so much about putting the mouse forward but starting at a high enough angle so the hole on the top clicks with the hole on the on the mouse.

So you have to get the latch in the hole at the top of the mouse first then once thats in the rest should click into place. But yeah, you can’t get it back on if you start at the back.

Here are the pictures: https://imgur.com/a/mqLrKZ9