How to treat the camshaft timing of Chevrolet Cruze 10 engine?

Look at the figure 8 of the camshaft. Look at the intake and exhaust of four cylinders at the same time. This is a cylinder. I would like to ask if the Chevrolet Cruze camshaft is separated from the camshaft wheel and there is no groove. Do you really want to know if it is installed? The camshaft and camshaft pulley are separated. Why is it special because it has no locating pin? ...