Represent a many to many relationship in sqlite

I want to represent a many to many relationship in a relational model and I'm having some doubts.

CREATE TABLE TipoDeSeguro
(
    tipoSeguro TEXT NOT NULL,
    tipoDeSeguroID INTEGER NOT NULL PRIMARY KEY
)
;

CREATE TABLE Cobertura
(
    nome TEXT NOT NULL,
    coberturaID INTEGER NOT NULL PRIMARY KEY
)
;

These are the tables I want to join using a many to many relationShip.

CREATE TABLE JoinTipoDeSeguroToCobertura
(
    coberturaID INTEGER,
    tipoDeSeguroID INTEGER
)
;

This is my junction table. Are both of these tuples PRIMARY KEYS? Should they both reference to their main class?

Best regards