I replaced head gaskets on the Mazda 2.5 KL motor as I'm putting it back I got all belts on all that's left is intake and radiator. I have this cam sensor not the one on bottom crank that ones there but this one I'm sure goes on right head toward fire wall. Can any one tell me wear it goes and do I have to pull the pulley and belt back off to replace and can you send me a pic that would be great this stupid Haynes book not helpful. Thank for any help.