Looked at that manual, and mine, and I haven't got a clue either. I think my bedroom manual control is under the bed behind a carpeted panel that I have to remove. The living room/galley one I "think" I have to cut the carpet under the dinette and remove a wooden panel to access the nut to manually retract the slider. Really, really stupid design if this is so. Couldn't they have just put in a plastic plug that you remove to insert the socket wrench? And then tell you where the darn this is?
2013 Mirada 29SE, I earned it!