I am in the process of dimensioning a drawing set of an enclosure assembly, and I am struggling to figure out how to tolerance the part correctly. The assembly is essentially a rectangular prism with rounded corners, it consists of two parts: the main enclosure and the face plate which must fit inside the enclosure. I attached a simplified version of the enclosure I am talking about. As I said the faceplate has to sit inside the enclosure, I was hoping to achieve a fit similar to a H7h6 clearance fit, but since this is not a shaft I don't know how to annotate it, or if this is even the right way of going about the tolerance in the first place. I am still a student so forgive my lack of understanding, tolerancing is something I don't think was taught to my class well.