we've got two writeups on club-s12.
http://www.club-s12.org/forums/index.php?showtopic=6468
http://www.club-s12.org/forums/index...howtopic=10604
it's for a safcII, but all the relevant information is there. you just have 1 less wire to splice compared to the SAFCII.
and just so you know...that ECU pinout is on the HARNESS side...I was looking at the connector from the ECU side, and got all the connections reversed from left to right and the damn thing didn't work..took me like two days to figure out with the help of people chatting to me and looking at the wiring diagram in the FSM
edit: also note that that pinout is for a USDM spec car..so it MAY be different, but I doubt it.