The Isis Adventure

Hello,
I just started examining my puzzle and noticed on the secret drawer groove. it looks as though you are able to put something in to open it like a coin or something of that sort. i was able to move it very slightly, but do not want to break it using excess force. Could someone let me know if this is not the way to open the drawer? just want to make sure i don't break it.
Thanks

No don't force it! don't stick anything it either. Once it is unlocked you should be able to use your finger nail to open it, no more than that.
Good Luck