Replacing oxygen sensor 2001 s60

[yabadabadoo1026]

got no response on a thread on electrical connector issue so heres a new post with different heading in another attempt.

I have spend 2+ hours over multiple days trying to figure out how to separate the electrical connector and just as clueless now than when i began. these same connectors are all over, not just the sensor. Nothing on them seems to depress or move to release. I have stuck a screwdriver thru every hole-----NOTHING????????

At this point i would have a better chance of figuring out a Rubics Cube.

I am totally stymied unless someone can tell me how to separate these. see attached for pic of connector. Thanks