Custom Module and Related Data

I thought I would see this pretty often however I see nothing.

I have a custom module in Visual Studio NOT a dynamic module.

However, I want to link (Related Data, Related Photos) to my Custom Module.

Thus Allowing the user to add item in my module and select related items in Sitefinity.

I have found 0 discussion on this topic

Example I have an Employee content type and I want to relate photos to this employee.
 This is done easily with a dynamic module. Problem with dynamic modules is Continuous integration and version control. I want to maintain in a Visual Studio Project and Git

Anyone?