Can someone identify the purpose of the groove that appears on the right hand side of the top carcass panel, in from the edge, further from the two squares?
mystery groove2.jpg
It seems like the little squares are to key in the front of the horizontal drawer dividers. The vertical groove isn't cut off by the drawer dividers, which makes me think it is for a locking mechanism of some sort:
mystery groove.jpg
If this is the case, anybody know how the locking mechanism works?
-jamie