i got you, i didnt read your question careful enough. just thought you were doing auto-man swap.
Wiring:
1. Locate the body harness (under dash harness that attached to the ECU) that attached to your old harness. Cut the old connector off (the one that attached to your SOHC harness) and attach your DOHC body harness connector. Just match the colors!
Yellow/Red --Tach
Yellow/Green--Speedometor
Orange--Ignition start
Black---Ground
Blue/Black---Water temp sensor
source:
KA24e to KA24de swap - Step-by-step.: 240sx Articles: Nissan Forums / Infiniti Forums - NICOclub
hopefully this answers your question.