Jayco only supply 5 poles with their Bag Awning Packages. 

When using only the bagged awning, you put four poles along the long wall to support the awning. However, when using the annex you put three poles along the long wall and two to support the door.

You only put three along the long wall when using the annexe so that you do not block the windows. In the middle of the long wall of the annexe there is a velcro loop to wrap around the middle pole.