I'm working on an enterprise project, as I can share the connection database of Domain Model Project, with all the data model project modules or web project?
I don't think you can direct share the connection of the database of the Domain Model Project. All the part of your database that will be used/shared by your web projects inside the enterprise project you can define it in the Domain Model Project. The specific parts for each web project you define inside the data model of each web project. To put everything in the same database you can you the classic Copy and Paste. You copy the connection database defined in the Domain Model Project and Paste it in each web project.