not doubt it's "right" in terms of making the electrics for your truck work, and there's nothing really wrong with that type of connection, it's found on some newer factory harnesses, but it's not right in terms of being a true reproduction of an original ... if you disconnect 2 of the wires that go the same direction you might be able to slip a short section of the right size shrink tube over both wires and slide it along them to that joint
Bill