Zenki and Kouki S14 F3 Plug Wiring Differences

[dongoesby]

After months of research on SR20 wirings (s14), I found out that with a matching engine harness and ECU, you can basically put it into any s13 and s14 with repining.

Now I have a Zenki S14 SR20 with complete harness and ECU ("WE") repinned to a 95' OBD-I Zenki S14 chasis. My objective is to swap this to my 98' Kouki S14 chasis. Since Kouki S14s are OBD-II, I understand that there are only minor wiring differences between the two S14s. All I have to do is to repin the F3 plug (dash wiring).

The harness has been pulled out of the car now. This should not be hard (even a local shop refuses to take my money and told me to do it myself). However, Since I've never done wiring before, I found myself failed reading the 200 pages wiring diagram on the FSM, and I tried but failed matching the wiring with the diagrams found on internet. (the wire colors are all different from the online diagrams i found).

Can anyone enlight me with the Zenki and Kouki S14 F3 wiring differences?
Or maybe I should pay some professionals to do it for me?