No idea, I didn't pay too much attention to that section reading the manual since I'm an R1S guy.Ah thank you! Is there just a single cable then or are there multiple cables that could be used depending on what you have back there? Looking at those ends, I'm just assuming one attachment point on each side of the bed and those are the only attachment points?
I remember seeing a picture of the cable looped through itself for a one-sided anchor point. Page 121 in the downloadable owner's manual.