H23 Vtec setup

THanks but what i am really looking for is the wiring for the automatic ecu... I know that most people that go to an h22 use the obd1 p13 ecu and a standard transaxel... However, i like the feel of the quick shifting Si's trans and want to keep it so i need to know how the trans is wired to the ecu... The car is obd2 and has the wires for the vtec setup but it uses all four of the pigtails while the 98 p5m only has pins for 3 of the pigtails... I want to know what the extra pigtail on the p14 is for...I'll try to post a pic so you guys can see what im saying...

thanks
Ezra-