I place Velcro on the fuselage side and put a loop of Velcro strap around the wire, as you close the tail I attach the hoop to the side. It keeps it away from the pipe.
But I have a wire each side as I hate single points of failure.

Actually the outer tube wall is not crazy hot back there because of the moving air between the two pipes. My outer pipe just touches the tailpipe skin and you don’t see any real heating in the paint.