How to make a table relation to another table?

Question

Entity Framework

Hello, need help!

It is necessary to build the database "Customs" using the model first principle of EF.
How do I join the CustomerHouse tables with Company and Products.
Simply, I do not understand how to put CustomerHouse - the main table "Customs".
If I did sql, then it would be easy to specify foreign key (company) references to company (id)

So, out of desperation, I thought that the attributes that should be like foreign key should be like pk and there in asssosiations connect their links ...