How to disconnect wiring harness

[Monster Poodle]

I'm in the process of cleaning and wrapping the rear trunk wiring harness. I've looked at the connectors shown in the image and for the life of me can't figure out how to disconnect them. Looked at videos, but every time they cut out that part.

I don't want to just brute force them apart for obvious reasons. Any helpful hints?

Thanks in advance!