I am having trouble identifying one of the connectors on the cable in the images below. The blue connector should be a male VGA connector, but I've no idea what the black one is. If I was to take a guess I would say mini-display, but the connector casing(?) is shaped similarly to the vga connector. I've tried doing a google image search and looking at all the different types of connectors, but I cannot identify it. What is the black connector type?