if those methods in that link are not acceptable for you, perhaps this is more to your liking:
1. create an account here (use a different name than on quitter, ideally) 2. visit (A) 3. add the rss feed for your twitter account, e.g. from rssitfor dot me 4. then you sub to the account here and it will show in the quitter public timeline. (A) https://fediverse.com/settings/mirror