I have a 2012 Sundance with the bal accu-slide. If you google it you can find videos of the slide operation along with maintenance manuals, videos, etc.
Mine has never required adjustment and I have used my rig at least one time per month since new in 2011. The only time it should need adjusting is when you see slack on any of the 4 cables inside or outside.
There has to be another factor for your cable breaking in such a short period of time.
Access to the motor and cable adjustments is either above the slide covered by a removable valance or in the case of a bed slide, it will be underneath the head portion of the bed.
After you google it you will see how simple this system is and it is really reliable if installed correctly from the factory.
Walter and Janie Rogers
2012 Sundance 277RL
TV 2006 Silverado 2500 6.0