Create a connector CMIS BonitaSoft

I'm working with BonitaSoft Community version 7.6.3 and I want to create a CMIS connector to list the folders and documents for version 5.2 of Alfresco. I noticed that for this version of Bonita many connectors that existed in version 5.9.1 disappeared. When I asked the question how could I list Alfresco's folders and documents indicated that I would have to create a connector, however when reading the documentation for UI Designer forms it is not possible and that the solution would be REST API extension. When I analyze information about how to create REST API extensions it only gives Performance, Efficiency and Teamwork. How can I get around this?