Not long ago a member with the same or similar coach as ours posted that he thought his bedroom wardrobe (curbside) slide was electric. I cannot locate that Forum thread again or I'd post this there.
It is still possible that his is electric, as I know some models are, but today while in the coach I happened to notice how easy the scissors mechanism is to see with the slideout in, so just to add some clarity to things I took a picture of it in case he wanted to check his out more closely. A flashlight proved handy.
The hydraulic ram and visible 1/4"? line(s) are near the bottom of, and mounted inside, the rollers' rail against the outer coach wall. The ram pushes runners up in the rail to retract the slide, and obviously pulls down to extend it. The scissors design allows just a few inches of ram throw to move the slide 18" or so in or out. There's likely another cylinder and ram on the other end of the slide, but structure there on mine makes it hard to see.
Joel