Open up the case of an aspire x3-710

Hi all

I purchsed an Aspire low spec - high yield desktop: ASPIRE X3-710.013.

Does any one know how to open up the unite / case. I've not been able to figure it out yet. Just removing the two black screws ... but it won't come off. It wont boulge.

Am I not using enough strength?

I don't want to be too forcefull, as there is this 'wireless' charger on top, which might be connected to the motherbord.

If anyone has any insigth or docuemation, it would be much appreciated

All the best,

Jakob