This heavy duty wiring should be the standard provided - it is much more robust. The thin wiring originally provided does not tolerate the vibrational fatigue of UK roads for very long.
Also, the HD wire is slightly shorter so does not need to be coiled around the fork leg / bars /gear cabling as much, so easier to fit (or remove for bike cable services, etc).
Complete The Kit
Velo 7/Velo 9/Enduro Cycle Computer Heavy Duty Sensor Fitting Kit