Bunk Room Slide Motor Access

Hello! I’m new here. Just picked up a 2010 Sundance 3300ck and the bunk house slide motor spins free, and doesn’t push out slide. My question is, how do you access the motor? I can get to the manual screw to push it out, but the motor is behind the frame rail. I see there’s a smugglers hide in that room, do you pull that tub out and access the motor through there? Any help would be appreciated.