@alec-kustanovich I'm not quite sure what you are asking for here.
Are you talking about how to create the link to the SAML identity provider outside of FusionAuth?
Or are you talking in particular about the code that is provided to you at the end of the start API call, as documented here: https://fusionauth.io/docs/v1/tech/apis/identity-providers/samlv2#start-a-saml-v2-login-request