ZF Master Moonphase Clasp Issue

[88np]

Hi,

I just received a ZF moonphase from intime but I'm having some issues with the clasp. I've been trying for 15 minutes to figure out how this thing works with no success. The whole mechanism also keeps falling off the strap as the spring bar just seems to just be slid into place in a groove with nothing to hold it there....is this right? Picture is below

 

[nido]

you can actually push the backside of that push here mark to lock the bar in place.