I couldn’t find this sync method in List of HOWTO.
Should I clean my glasses, or … ?
I can for sure write an Howto and add it to the list, but I think that your post is eligible “as is”.
Anybody know WHY you need to EXPLICITLY set up a given /e/ email contacts account to sync with its own contacts? Seems to me that particular association should be automatic upon setting up a new account with the option of syncing to other contact lists. Pretty sure it would be a relatively simple “new account” profile template change …