ok so i bought a 96 ek b16a2 swap p72ecu. car has a cel on for secondary 02 sensor. the primary is still hooked up, but there is no 2ndary hooked up, how do i hook this up ? do i have to tap into the ecu wires? there is a bung on the exhaust for a 2nd one just no were to plug it in! i really wanna get the cel off so i can pass inspection befor i turbo it. new york state is a pain in the butt with this! btw the prev owner gave me a 4 wire 02 sensor i just dont know where or what to do with it! any help is appreciated guys im clueless with this. i have searched and searched and cant come up with anything!