Install Shelves into Cabinet Carcass

What happens here

The prepared shelves are installed inside the cabinet carcass. The exact method of attachment isn't explicitly shown for all shelves, but given the previous use of pocket holes for the carcass, it's likely they were either screwed directly into the cabinet sides (possibly with additional pocket holes) or supported by cleats. The shelves are strategically placed to create varied storage compartments.

Goal: Integrate internal shelving into the assembled cabinet