O2 Sensor Connector Disconnect

I had my 2004 Tundra cats stolen last month in the Seattle area.
I'm trying to replace one faulty O2 sensor before I replace the cats.

I'm trying to replace the Bank1-Position1 O2 sensor (Light on. Error code says B1-P1).
I was able to loosen the sensor after soaking it with PB Blaster.

But, the connector is next to impossible to disconnect.
Do you lift the connector release tab or press it in?
Any ideas on a connector disconnect technique without breaking the whole thing?
Any photos available that shows the disconnect detail?

Thanks.

 

Press down on the red arrow to release the connector. Push the connectors together as you are pressing down on the red arrow then pull to release.

 

Try some silicone spray on the connector to loosen the plastics grip.

 

Those things are a bitch to take off.