The documentation doesn't specify any settings for a custom implemented WS Fed Authentication. As said earlier, no AD FS or SAML or OpenId. The WS Fed Authentication settings mentioned in the link you shared uses AD FS but doesn't specify how to configure a custom implemented authentication.
Documentation describes general setup of WSFED. It takes ADFS as an example because thats a common known IDP. Same settings will apply to a custom created wsfed as well as long as it supports protocol.