KZ1100 spectre switched lighting ?

Just getting stuck into the damaged spectra, this is now up and running but the electrics are a mess. The gauges headlight and switch gear were all decimated. So will be useing one J and a GPZ switch, I seem to recall someone on here having done this so as to have switchable on off lighting as apposed to the stock lights on system. Anyone done it or remember the thread etc much appreciated