The book is ambiguous Slot go towards camshaft or away from camshaft??????. Need to know please...
During the power stroke the piston is pressed against the cam side due to the angle of the rod, so you may turn the piston slot away from the camshaft.
Thanks Mark and Roger for the helpful information
I have a sign on my shop wall: Cast ye not pearls before swine, nor ye piston slot before ye camshaft.