looking at the cover from the screw at 3 o-clock count from that one clockwise 4 screws. (5:30) 2 more over 6:30 if the fill level screw. I always pull the cover to clean out the clutch crumbs and check shoe wear and make sure stator wires are safe. I refill with 3-1/2 oz. of Harley BT primary fluid. not motor oil the older P-Fluid, some use Ford Type-F ATF
Don't bother with the "level screw", just drain it and add the prescribed amount (140 cc). Primary oil should be changed often, at least as often as you change engine oil. Removing the cover as suggested by Bodine is prudent, perhaps not on every oil change, but now and then.