Definitely one of the best inventions for installers - the cable tie.
Quick and easy to use anytime and anywhere. The universal weapon on the roof to securely and neatly fasten the solar cables to the substructure. For the photovoltaic sector, of course, in black UV-resistant version.
The plug connections of modules and solar lines must not rest on the roof. Otherwise they could be damaged, for example, by slipping ice slabs or rainwater run-off. Simply pull the plug connection centrally to the rail with a cable tie.