How this particular Builder pattern works

I am learning about design patterns and reached the Builder pattern. This is the UML that I have as an example:

I understood how the car is made and the logic behind the builder but can't understand where the car manual is made in this example. The description says that it is made along with the car building. Is the UML not complete or I misunderstood something. Where is the CarManualBuilder initialization? How can I create a manual for a particular car in this particular pattern?