i m doing swap on the crx ...and use my 88 crx engine wiring harness with 91 integra engine..and everything seem right plug n play but one plug that i couldnt find ... it s right back of the block near the oil pressure sensor and see the little green plug and i couldnt find the other wiring to plug in it... what is this??? i been look at the integra manual book and i couldnt find... pleae let me know about this.,.,

thanks
jose