"Steve" wrote in
:

If you add foam insulation, you will be adding weight to the wire
bundle which in your case, is unsupported except where the individual
wires exit the mast. The weight and constant motion will eventually
cause the wire stands to fatigue and break.

Well, 5 years and 20,000 miles later this has yet to occur. I just had the
whole wire bundle out and saw no signs of what you're describing.

-- Geoff