The three pictures do not depict a three colored plastic object. One appears to be the back of a laptop, one an H with an empty battery bay, and the other a plastic cover. Two of them on a red mat.
The Cover in your first pic is just that, a Cover. It's purpose is to cover the Wire Connection used to connect the RealSense Module to your H. As a previous reply stated, it mounts over the connector at the back bottom of the H.