I don't have my O2 sensor in front of me, so this is going off the Helms manual:
Using this diagram, you're looking at the O2's connector:
The Helms lists the connector from the wiring harness side, so the coordinating wires on the O2 connector are:
Top right: (heater +)
Top left: (heater - )
Bottom right: (sensor + )
Bottom left: (sensor - )
Hope that helps.