It's been a long time, but we had one of these.
It seems like the arms, which are in the awning box, were spring loaded to the center. You had to turn something that moved a spring-loaded locking pin and then lower each arm separately into the brackets on the MH. At this point, you had to unlock the arms so that the awning would unroll.
The 10000 had its own special awning rod and it had a special end that turned the spring so that the arm would come down out of the box. I'll try to think on it some more, but it's been an awful long time.