I have seen this topic on the forum before and never could visualize what it was. I had to take the cover off today and thought I would share what it is and what you need to manual bring the slide in and out.
I am not sure if you need to pull the pin out so you can bypass the motor BUT it is a 5/8 inch and you can be sure I will have a socket ready to go if needed.
Here are some pictures of the slide hardware
http://picasaweb.google.com/geondebi/Fifthwheel#