GSR wiring harness on GS question…

Last year I bought a 1997 Acura Integra GS automatic, it had only had one owner and it was fully stock. The best daily driver, until I got a new daily driver. The Integra became my project car, and the goal was to make the automatic GS into a manual GSR. I gathered the engine/transmission and all the parts and started to work on it. At the moment I have pretty much completed the swap, I did the mounts, the pedal swap, did the clutch switch and reverse light wiring, the metal work so that the shift linkage could fit, I bought a 1996 GSR ECU and installed it, among other important pieces. Sadly I tried to turn it on and I was half successful, the car wouldn’t idle but it would rev. I didn’t want to mess anything up so I turned it off I noticed that it was smoking a very tiny amount from somewhere so I got cautious. I figured I’d need a new engine harness for the 2000 GSR motor because not all of the connections were complete with the old harness so I got a 2001 GSR harness and started to get to work connecting every single pin connecter I could find. I ran into an issue where the 4th Pin connector from the passenger wiring harness tower doesn’t connect to my new 2001 gsr harness. The GS pin connector needs 6 pins and the GSR connector only has 3. Is this 4th pin connector important? How can I make it so that it connects to my new harness?I’m not a mechanic just a guy who likes these types of cars and would love to get this car running.

Thanks y’all