Abstract: Methods, apparatuses, and systems are described for a cargo storage assembly. The system includes a first panel, a second panel, an overlap, and a hinge. The hinge is configured to rotate the second panel to a vertical orientation with respect to the first panel to expose an underfloor compartment. The first panel has a groove proximate to the second panel that extends along a top surface of the first panel. The second panel has a protrusion proximate to the first panel that extends along a bottom surface of the second panel. The protrusion of the second panel corresponds in size to the groove of the first panel. The overlap is formed between the groove and the protrusion with the first panel and the second panel in a horizontal configuration.