90 basket

Ok so i purchased a 1990 toyota. The p/o desided it would be a good time to cut the wiring harnes in half. Thus meaning you dident plug aney thing in incorectly. the motor tranny and t-case are from a 12-88 toyota p/u the actual truck is a 12-89. the proble,m her lies in the fact the the finished truck isent exactly the same.

Now I have spliced soderd and gotten the truck to run. My problem comes in to the fact that it runs super rich.

The O2 sensor is not hooked up. I know this will cause it to run rich but my issue is the fact that i do not have a plu to plug in to.

dose aney one here know the 4 wiers i need to hook my O2 sensor up.