Nice. I would NEVER have found it!. The lack of readily identifiable manufacturer part numbers makes this a challenge of course.
So as to understand one of your previous comments, it seems that if the connector is only held down on one side that you can't easily open a lever with one hand without having the connector pop out of the clip? In other words this is more of a retention clip to keep things neat after the wiring is done. I can see how it would work if 2 sides are held down like the example in the middle. Not sure I'm being clear...