A method of making a panel assembly that includes forming a thermoplastic panel, placing a thermoset portion into a pocket in a mold, placing an attachment member into the pocket in the mold, positioning the thermoplastic panel in the mold, cooling the thermoplastic panel while heating the thermoset portion to flow at least a portion of the thermoset portion into openings defined in the thermoplastic panel, and cooling the panel assembly so that the thermoset portion hardens, thereby securing the attachment member to the thermoplastic panel.