Last fall I was washing the bus and noticed that the awning lock lever was rolled down in the lock position but I had missed the catch altogether the lock lever was on top of the catch. This could have been a bad deal, some real Zip Dee excitement.
Made this simple bracket to lock the arms to the top slide anchor. In my case the arms look like they touch the body so the bracket was arranged to hold the arms away from the body by about a 1/2", turned out that is a little much but the things work OK and I don't believe the arms can get out with the brackets installed.
pic 1 longer bolt installed in the top slide anchor.
pic 2 brackets
pic 3 brackets installed with threaded knob.
Put a set on the front and rear arms.