i have 94 del sol with d16y8 swap(full) and p28 ecu obd1 i need to know the wiring of the o2. the one in the exhaust is 3 wires(no plug) and the plug i think for o2 hs 2 . the cel is on and i believe is the 02. i couldnt fully read. how do i wire that. pics/link would help lots