Two screws on the cap. Remove cap. Tape the rotor so it will not turn. Remover four corner screws and remove cover. The points are in right there. If the rotor turns the teeth will not mesh correctly when replacing the cover and you will have to retime the magneto.
If you have a magneto and not a distributor and a key switch, it still only shorts out the points so you do not have a spark. A magneto makes its own voltage unlike a distributor that needs voltage from a battery.