I have a kingdom 6 from around the same period!  Love the tent as well!  I cannot recall exactly what color combination will line up on the side with the included vestibule, but if you line up the black tabs on the foot print, black tabs on the tent, black tabs on the rainfly, and do the same with the orange tabs all should end well.  Hope this helps!  Next time I set up my kingdom 6, which is hopefully sooner than later, I will check and see exactly what color tab is on the vestibule side. 

At REI, we believe a life outdoors is a life well-lived.