Vaude 25 ultralight backpack

Hi
All, i just got the Vaude 25 ultralight backpack from someone and i heard you can stow it in its upper lid. I unzipped the upper lid, turned the upper lid inside out, stuffed the whole thing in there and zipped it back up. It had a diagram inside the lid, but it wasn’t to detailed, just wanna know if i am doing it right.