If you're using the keyway closest to the "B" mark on the intake,you would line the "B" mark up with the dash (not the dot above it).That will be as it was when new,and the intake timing timing will be about 5 degrees retarded from the actual manual
spec of 0.190" lift at TDC.
It will run and cause no damage,but it could run better if the timing is more accurate.
The keyway in the cam faces in the same direction as the drive side lobe,so you don't have to remove the camwheel nut to know where the key is facing.There are 3 keyways in the camwheel,and you must know which one you're using.
I'd be more inclined to use the keyway closest to the "A" mark,and position the "A" mark one tooth ahead of the dash (on the opposite side to the dot).I would then check the timing with a degree wheel or by measuring tappet lift at TDC.If you're out by one tooth,the tappet lift at TDC will change by about 0.049".Intake valve lift at TDC can be somewhere between 0.190" and 0.210",so tappet lift will be 0.169"-0.187".