when it says: Connect the yellow s-afr wire to the portion of wire (p) going to the factory ecu (sinle output)

Connect the white s-afr wire to the portion of wire (p) going away from the ecu (single input)

What do i do ?

appeciate it.

 

This is a "piggyback" unit, so what it is saying is it wants you to put the "box" per say between the ecu and the engine. So wire (p) runs from the ecu to the engine. You cut that wire and the part that is still coming from the ecu is connected to the yellow wire and the part that is coming from the engine is connected to the white wire.