How to re-wire o2 sensor?

[Nibbler2015]

Hey, so I'm getting a code for low voltage on o2 sensor bank 1.

I replaced spark plugs and both o2 sensors. But still low voltage on I believe the first one (upstream). Thinking I must have a short or broken wire somewhere.

Has anyone re-wire the sensor? Any ideas where it plugs/goes into the ecm?

 

[Nibbler2015]

I have found this, bug how do I determine which one is the signal wire?

 

[BigLee]

Unless you see actual damage to the wires or wiring harness, I'd say that the likelihood of wiring issues are pretty slim.
Have you tried to see if what the O2 sensor is indicating is real? As in an actual lean condition?
Which engine do you have?