ok there are going to be more then one unusable plug but if you really want to know the right way to do the wiring go to
www.tophatperformance.com and email scott. he is the only reason that i got through my swap. he is a wiring guru for sr20. oh and i just finished up my s14 sr20det into a s13 chassis and i wrote up a complete how to on it with all the little things that mas to happen, sensor swap outs and what not so if you want a copy of it i would be more then happy to email it to you. if you need it email me
[email protected].