On this SATA cable, for what is the lug on the one plug? I think the "lock" (that the physical connection is more stable) is managed by the silver metal. But the lug? I haven't any idea for what this should be in practice.
On the right angle connector, presumably to make it easier to hold and handle, though I've never seen one with that extension. Considering it's a low profile variant of SATA, it does seem a little odd.