i have searched google and here, and I cannot figure out what is supposed to fit in here. Yes I need to know It clearly has notches to hold a tool of some sort, so it is not structural molding for the case... Someone has to have seen some kind of tool that fits?? There is an identical recess for it on the opposite side. The rear of the case has a recess for something similar but no notches to hold it. Maybe when you fold the case out flat you can put the tool in this slot to help hold the saw or something in some way for repair??