Thanks

You must insert first upper part and then rotate down and click (edited)
@RB86_1602414 Yes, it is prety tricky - I have posted an image for others. But even when so, I must to increase hole size first. (edited)

Nice idea, but unfortunatelly unfinished. Some mobile holder should be designed or remixed.
Unfortunatelly the hole seems to be too narrow for upper hook. A file is needed to enlarge it.
