[offon]

Hello everyone. I'm trying to open the case of my computer, however no effort yet. As I don't know what type of PC I have got (Dell, HP etc.) I can't really describe it. However, I have got some pictures. Also, this is not my first time I'm opening a case on a PC, so I don't really know how to open it. I've tried to lift it, push it back etc. and nothing worked.

https://imageshack.com/i/jmipd3j
https://imageshack.com/i/ndd1v1j
https://imageshack.com/i/gh8v25j

I hope you can help me.

EDIT: The case is called Eurocase ML 5410