Yes, should be and indeed you're right as I think there are nor protrusions except on the glass section.
Mine is a different version, having a storage place for sunglasses. When I open that, the 2 last clips are easily found and even better to access as on the glass part. Note that the headliner incorperates a plastic frame with slots in which the metal spring clips can be quite tight.
You just have to keep trying finding the exact spot where to put your blade. Sorry, can't find a picture this quickly to make it more visible.
Last edited by Leo_NL; 14-09-16 at 17:19.