I know this is a shot in the dark, but I'm really hoping someone can help me out here. I'm currently trying to make a case/box for my emergency injection that I have to carry on me at all times. I'm using onshape. I'm able to get a hinged box with snap lid. However, for the life of me I can't seem to figure out how to add the part for my vial to snap into place, yet.. I know it's gotta be easier than I'm making it, but I'm still learning. I'm posting pics of the case I'm basing my model on. Specifically the area I'm talking about.