How to move an existing .xcdatamodel to another project?

Question

Objective-C

There are 2 xcode projects, one is connected to the other as a pod, and is a core, it has its own core data model and in fact it is already in use. In the main project, views are written, etc., the model itself is connected as Resources.bundle -> ApiModels.momd -> ApiModels.mom. They worked on the project before me and now I don’t understand how they did it. It was necessary to make changes to the model and that's actually the whole task