It's amazing how much crud can build up under things.
Was very similar in under the rear bar of the Wagz.
Despite plenty of stuff I need to do to the 2 lines, today using some radiator hose, a hose clamp and the lid off a tin of corn, I made a plate for behind the steering wheel so the horn on the Wagz will work with the R34 wheel. (previous effort worked untill I turned the wheel)