[keycloak-user] Not able to extend User Storage SPI without changing Keycloak configuration files

Goal: Setup custom federation which extends ldap provider. Question: What is the proper way to extend the ldap federation while adding one more configuration input? (without changing internal keycloak files) I followed the steps in https://www.keycloak.org/docs/latest/server_development/index.html#_user-... and specify my own provider and providerFactory, In admin console, when trying to create the federation "custom-ldap", most of the input fields do not have a label and some buttons like "Test connection" are missing. The configuration property that I added and customized has label/default value/tooltip. If it is not possible to extend the form, is there an easy way how to inherit the same UI form from the ldap federation page in my extension? (Im new to keycloak, and do not have experience with Freemarker). Thank you so much for your support, David