timing alignment marks
 

I'm doing the timing chain and components on my 1990 420. Is there anywhere that shows the timing alignment marks on both cams? The passenger side marks are easy to see and line up perfectly when the balancer is at 0 but the drivers side marks are uncertain to align. There's a knotch on the cam like the other side but the relating cam tower mark like the other side is in the rear and way off if that's the correct one and another line that's close seems like it's a casting impression but I'm uncertain.

Does anyone have this info or know how or where to look it up?

I need to verify if the timing is correct now and after.