Dell OptiPlex 7010, 7020, 790, 990, 9020, 3620, T1700 Bay Cover Plate, identified by part number 1B31DJK00-600-G, is a component designed to cover the expansion bays on compatible Dell OptiPlex desktop computers. This cover plate serves to protect the internal components housed within the expansion bays, such as optical drives or additional storage drives. It ensures a clean and streamlined appearance for the front panel of the desktop while providing added protection to the internal components.