Reference Foreign Key with 3 Foreign Key But 1 Table

Question

public class Category
{
public Guid Id { get; set; }
public string Name { get; set; }
}
public class Product
{
public Guid Id { get; set; }
public Guid CategoryId2 { get; set; }
public Guid CategoryId3 { get; set; }
public string Code { get; set; }
public string Name { get; set; }
[ForeignKey("Category")]
public Guid CategoryId1 { get; set; }
public virtual Category Category { get; set; }
}

I have these 2 tables. The Product has 3 foreign key which I need to connect in Category. I only sure about the CategoryId1 but I dont know what to do in CategoryId2 and CategoryId3. what should I do?