Jere
There are three wires. Cut off the plug and strip back the wire ends. The
one with the stainless steel wire core is the OXS signal wire. This goes to
the single OXS spade plug. The other two are the heater wires (0v and 12v).
These connect to the double OXS plug.

BTW it is almost impossible to solder the stainless steel wire. I gave up
and used a screw connector.

Hope this helps.
Larry

<<I bought a Bosch 13913 three wire oxygen sensor.  I am preparing to cut
the
end off and solder the VW end in its place.  Does anyone have the wiring
schematic for this procedure?>>