Sr20 Wiring Dilemma

[tEknoS13]

Hello everyone I got a problem with my SR wiring harness and Im just about going crazy.

The problem is with the O2 sensor wiring. I was working on extending it like heavythrottle.com states so, but came across this problem. The site says there are 3 wires for the O2 sensor which are Brown, White, and Brown with yellow stripe. I have the white and brown wires but no brown/yellow stripe WTF!!

I checked starting from the ECU pinout and it doesn't have a wire that color. Heavythrottle only gives the function for the Brown wire which is power I believe (+12v)

Can someone tell me what the other 2 wires are for? (obviously one is for ground but which one) Or what should I do, the s14 FSM is not really helping.

[tEknoS13]

BTW: my harness did not come with a O2 connector so Im using my DOHC KA's connector just wiring it like the SR should be