Wires are connected to perm mushrooms under the apron and the tape from what I can remember that they used was the same tape as rockclimbers use to attach themselves to their gear which from a distant memory has something like 2 tons working load and 3.5 ton failure load.
Which is completely different to the old !!!!e bit of washing line blue rope that seems to be in favour in the UK.
So contacttower I would say its orders of magnitude better than the UK.