[sammyg2]

If the car still runs right with the male plug just stuck back in the female plug, life is good for now. Don't mess with it until you are ready But eventually it will need to be addressed.

On mine, I installed a three wire O2 sensor instead of the single wire, so i have basically the same set up as you except for the type of connector and harness.
I found a spare two wire connector to supply the power to my sensor heater just sitting in my engine compartment that fit the upgraded O2 sensor perfectly and plugged it in, lord knows what it was supposed to be used for. Maybe rear wiper, who knows. It works. So all i had to do was replace the connector for the signal wire.

Bottom line is, if you can seperate the signal wire from the main connector then you only have to splice in a single connector. If you can't seperate the signal wire from the two power wires, you will have to replace the main connector with a 3 wire connector.