the camshaft pins up into the head with roughly a 6mm drill bit and if you look on the crank pulley there is a mark on one of the teeth, if you look on the oil seal casing behind there is a round hole in it look to the left of that hole and the caing has a straight edge to it (you will see what i mean when you look) line the right hand edge of the tooth with the mark on up with that straight edge of the casing
i did one this morning so fresh in my mind lol
hope this makes sense without pics