In the first picture you can see sensor A is on the top and sensor B on the bottom. What do they both do?
Also I am not sure if sure if my sensors are wrong:
sensor A you will see the plug has 3 pins but there are only 2 wires coming from the back?
The sensor on the bottom (sensor B) only has one pin, whereas you will see the plug has two terminals, but there is just one wire at the back?
I would be grateful if someone could clarify these things as I am a little confused