Not sure this picture comes in however, What is the sensor on the left side of the cartridge. I believe a green wire. Anyway, the filter cartridge was leaking and found this sensor had come loose. Just wondering what it is.
That particular green wire (left of your hand) is connected to a disc type sensor which is an oil pressure sensor. When you turn the key on before start...there is a buzzing sound to indicate low oil pressure. Once you start the engine the buzzer stops because the switch opens (lose ground) meaning oil pressure has come up above the lower limits of the sensor.