Stereo & Electronics - Oxygen sensor has 2 brown wires.

I cut a narrowband oxygen sensor harness a while ago and ended up just putting it in a cabinet. I need to use this again so i need to splice it back together. Problem is, there are two brown wires and idk which is which.

Does it matter which is connected to which?

when i installed my long tubes, i spliced some wire in so i didn't have to buy extensions, and the first time i didn't mark the wires so i knew which ones matched. i just guess and got it right the first time.

that's all the advice i can give, i guess you'll know it if it's jacked up when you put it on.