HP 5851-5360 USB port cover is a replacement cover for the control panel on Officejet Enterprise Color X585 models. It is identified in HP’s parts list specifically as the control panel USB cover, distinguishing it from the separate control panel access cover and other machine covers.
HP lists this component as a level A customer self-repair part. The X585 parts table shows one cover in the assembly. It is intended for the control panel USB opening on the specified printer series.