You were correct. I was comparing the mechanism on this window to the windows at the dinette and couch (same awning style windows). Those other windows had a little more "vertical" separation between the window frame and the window connection, allowing that silver arm (with 2 small rivets) to clear "a small fence" on the frame.
Really not enough room to bend that arm, as when the window is closed the bend would be an issue... I was able to file a notch in that "small fence" on the frame to allow the rivets on that silver arm to clear the fence and the window to close! Works like a champ now!!
Thanks for the response