That data is for a bendix magneto. Although the operating principles are the same using this data in wrong and potentially dangerous. It seems to be a model 37A.
CORRECTION - my bad - it does mention Rotax on the 2nd page. Be careful when rotating it! (Providing it still rotates)
my dad worked in a radio shop after the war and he told me about that. charging a cap and tossing it so someone seemed to be the gag played on you when they were new. like you said, after the first time you are very leery about catching anything tossed to you.