One to several many relationships

Consider the two tables as follows:
Table 1 (id_col, name_col)
Table 2 (uid_col, code_col_1, code_col_2)

where,
id_col is the primary key for Table1
uid_col is the primary key for Table2
and id_col is one to many with code_col_1 and code_col_2

Records may look like this: -
Table1
1, xxx
2, yyy

Table2
11, 1, 2
12, 2, 1
12, 2, 2

What will JPA look like in the following classes?

@Entity
@Table(name = "Table1")
public class T1 {
    @OneToMany(targetEntity=T2.class, mappedBy="??????", cascade=CascadeType.ALL)
    private List<T2> t2; //???not sure about this
}

@Entity
@Table(name = "Table2")
public class T2 {
    @ManyToOne
    @JoinColumn(name="code_col_1")
    private T1 t1;  //???not sure what goes here
}