Hey all, newbie with a hybrid: b18c5 in a 1988 crx.

Just bought the car, and the freakin thing has no o2 sensors hooked up. I have ordered the o2s for before and after the cat. The question is where do these two hook up? I see a connector on the front of the bell housing, which o2 sensor is this for? Where is the other connector? :?:

Thanks