Slide wire guide
Ours broke the other day. Poor install from the factory plain and simple. The plastic thing is attached at camper frame rail by two screws which was incorrectly installed and the plastic pulled straight through with screws still attached to frame rail. It is also poorly attached to the slide out end with rivets and one rivet is incorrectly installed. Very shoddy workmanship. We have a big two week trip coming up in 4 days so my fix was to attaché the strap back to the frame using several zip ties. It'll hold until this thing heads to the dealer in November to fix shall I say many problem all of which are the result of poorly skilled labor building these things.
I am sure that plastic strap is a sold item it has some brand name on it. It's just another casualty on the list.
2012 Fun finder Xtra XT-276, Pitbull strapless restraints
2016 GMC Sierra Denali HD Duramax/Allison 4wd
WERA Expert #826