Once you understand, it's really quite simple.
You align the camshaft timing marks (mark on stand with notch on washer) and TDC on balancer with pointer on block. You don't have to worry about any marks on the injection pump chain sprocket. Once everything is together with tensioner installed, and both these marks aligned, you align the timing mark on the injection pump with the notch in the splined area. With the injection pump aligned, you simply slip the pump into place without moving the engine and camshaft markers and you have your coarse timing accomplished.
Then snug the injection pump bolts and go through "start of delivery" timing procedure with a drip tube. If you have a sensor for you timing light AND can get the timing close enough to start the engine, you can do your fine adjustment with the timing light.
I hope this is clear and helpful,