A method of installing an overhead panel to another panel is provided. The method includes connecting a base of a positioning structure to a surface of the overhead panel. The positioning structure includes the base, a stem that extends outwardly from the base and an enlarged head that extends outwardly from the stem and overhangs the base. The enlarged head of the positioning structure is moved against a ledge of the another panel. The ledge contacts the enlarged head and moves the enlarged head from a catch configuration to an insertion configuration where the enlarged head reduces in dimension. The enlarged head is passed by the ledge such that the enlarged head moves from the insertion configuration to the catch configuration of increased dimension. The enlarged head is hung on the ledge such that the positioning structure supports the overhead panel in a pre-installation position that is different from an installed position.