Sadly they do not design the cable properly.
The RV likely does not have a bumper, but if it does and the receiver is hooked to it, bad place to attach cable.
Likewise the receiver is a bad place.. HERE IS WHY.
In my personal expierence, I was going down the road, cable attached to receiver, Receiver welded to cross bar, Cross bar bolted to frame rails with a bracket at each end... Only it wasn't.. Seems the brackets broke and dropped the cross rail on the ground, Break-0away and all.
As it happens, the only thing still hooked up was the brake control wire, worked like a champ and when I got the RV stopped, the car was right where it belonged relative to the RV
The re-do I got some extra cable (Any hardware) and clamps and extended the break away cable to a spot on the motor home NOT the receiver. (part of the motor home frame) I did, however, run it through a loop on the receiver Do not want it to pull cause I cornered
Home is where I park it!