What the heck is this?

Does it have a manual slide? Or an emergency way to pull the slide in? I considered purchasing a travel trailer that had a manual slide and it was pulled in and out with a wrench like this.

Here are the images the OP was trying to post:

There you go, that should work if you click the link. But to answer your question, I have no idea what that thing is.

Lets see if this works:

https://drive.google.com/file/d/0B2umwd439TkLQ04tQVU2RG5pOUE/view

I can't get them to work.
Bill

Can't see the images.