340 Oil Priming Question First Start

So, as a minimum, the passenger side shaft appears to be installed incorrectly as the notch should be in the back.
Your right! The shaft is the wrong way. Can Should I reverse the shaft and maintain the rocker positions/orientations?
After very careful inspection I found a very low relief notch in the driver shaft towards the front pointing to the engine centerline as the fsm states it should. See pic