Hi Merv
When at Cruisemaster/Vehicle Components a little time back, Keiran the service manager noticed that the brake safe cable attachment on my Cruiser is quite independent of the towbar, and he remarked that he rarely sees that. If the towbar goes, so does the cable.
I have a stainless steel cable which runs in between the towbar and the bumper bar and attaches on to the vehicle chassis. The other end has a loop which attaches to the brake safe cable with a small D shackle.
Cheers
Bas