How to integrate running standalone S/4HANA frontend server into embedded deployment

Hello gurus

3 years ago we deployed a S/4HANA installation in a hub deployment architecture. Now, and after some time of use, we decided to convert this hub deployment into embedded deployment.

The objective is install all the necessary packages in the backend system, and maybe with the maintenance planner XML and the SUM tool is enough, but the question is how to export all configuration done before in the frontend or what are the necessary steps to repeat again. We do not find any guide to solve this issue.

how to export all configuration done before or what are the necessary steps to repeat again

Thanks a lot