[ptcruisergt2003]

I am installing a camshaft sensor and have no idea what the camshaft is or where to begin looking. I already located one of the sensor on the side of the engine, this morning, but am having trouble finding the location of the camshaft position sensor. any of you can look it up in the manula and maybe post a PDF for me, please?

I have a 2003 PT Cruiser GT Turbo and the part number I am installing is the BWD CSS1547... expensive for a sensor.