2003 Dakota 4.7L, quad, 4x4, single catalytic converter

What is the best way to unclip the o2 sensor wire connector (OE version)? I have managed the post cat one, but I need to know if there are any tricks so I can master the pre cat sensor.

 

IIRC there's a red lock slid into place. I just yanked the red thing out and it slid right off.

 

mine just has a clip you press down... no red lock like some of the non 4.7 models have. i'm going to try a screwdriver, but i'm sure i'll break the dakota end of the connector's wires