How to extend existing model from one connection to the other?

[Vishwajeet1]

I can see the VIEWS and MODELS coming from the source through remote dependency, but I am not able to use EXTENSION: Required (on the core_model, with connection_1) and EXTENDS: [core_model] (either same connection_1 or a different connection_2.) and get all the joins associated with the explore automatically. Do I have to write all the joins in the new model again? I wish I could use the code. Thanks,