HP 924447-001 back cover is a replacement enclosure part for the HP Elite x2 1012 G2 Tablet. HP identifies this part number for the version without an infrared camera, making the camera configuration the key distinction for this cover.
HP lists it separately from 924446-001, which is described as including a stand, hinge and infrared camera holder. The 924447-001 is specifically the back cover for the non-infrared-camera version. The service guide describes this component as part of a service replacement procedure and secures it with six Torx T5 3 mm screws.