I forgot to take pictures so the explanation might be a bit vague, but i'll try my best to make it clear.
On the cargo cover ends there is a hole where between two ribs that mount on the car. If you take a peek in the hole you will see a hollow round tube that has small pin going through it. That pin is what keeps everything closed, so you need to remove it.
In order to do it I banged on it on the other side so that the tube became exposed on the end I wanted to remove, and then with a hammer and a small bit removed the pin.
You might need help from another person to compress the end or the tube may not become exposed.
I'm thinking disassemble it again in order to do a tutorial video and develop a rebuild kit with my 3d printer, do you think it's worth it? Don't know if many people experience problems with their cover..