Sheared off O2 Sensor

[iNTENZiTY513]

One of my O2 sensor connectors was sheard off the main wiring harness, there are four wires, 1 grey, 1 black, and 2 whites, anyone know if the 2 white wires matter, are they grounds or hot wires? I have no way to distinguish the two...

I guess I could use a multimeter to test the two whites, but I wanted to check on here to see if anyone knows first.

Scott

[ilovemycar]

The whites don't matter...just hook them up.