What the model reflection module does is create database objects that reflect your database structure – it creates an object for each entity, attribute, and reference. The only way the module can do this is in runtime, so what you need to do is the following:
Everything the docusign connector needs will now be in the database. Once you add the “configuration” page from the docusign connector and run your application, you'll be able to configure things there based on what the Mx Reflection module added to your database.