Easy question on check engine light

OK, I have read other posts on the check engine light and how you find the green door and inside is the blue connector that you jumper, etc. How do you find the blue connector on a 95 Honda Civic. The check engine light is on and I need to read the codes. I don't have access to an Auto Zone. I do, however, need to get this car back on the road. It surges terribley and is running very rich. I suspect the O2 but want to be sure. I have replaced the map sensor and air flow sensors. Your help would be greatly appreciated.