EGR Pipe Cover Wire Harness Clip Removal?

I'm following @NutzAboutBolts' excellent EGR Pipe and Cooler Cleaning video. I've watched the videos a few times, so I'm confident about doing the job, but on my other cars I have a history of messing-up wiring clips and don't really want to start this project on a bad foot.

In the attached pic, he has pulled back the rubber cover on the manifold side of the pipe, gets his needle nose pliers, then after the clip holding it to the wiring harness doesn't initially loosen, he says "let me see if I'm doing this right" and when it still doesn't come, he hums a little tune. Unfortunately though, you can't see how it comes loose.

Before I pry or squeeze the wrong way -- it looks to me a small screwdriver might help -- could someone describe the trick? What's the goal with the clip. As you can see from the close-up of mine (2nd pic), I'm already starting to mangle the thing.

Thanks!

 

Okay, with @Raytheeagle's "upper ends" and @ASRDogman's "top and bottom", combined with a pic of the clip with which I had only sparingly tried (below), I see that I should have ignored the hollow, clippy-looking sides and needed to pay attention to the more solid-looking longways (at least to these aging eyes)

When I pushed at the leg or flap at the top of the oblong clip with a small sewing machine screwdriver, so the flap would go back to be in contact with the rest of the structure, they both were easy to pop through the hole with my thumb.

Thanks @Raytheeagle and @ASRDogman -- I had been squeezing and trying to unclip the opposite way!

Couldn't have done it without you. Thanks!