Piaggio Vespa Engine Starter Safety Switch PX, T5, PK (Electric Start Model)
The Starter Switch is fitted to the part of the Harness that operates the the Starter Motor. This is connected to the Main Harness underneath the Horncast. If you're unsure of which cables connected to which part of the Harness. We would reccomend consulting a Wiring diagram for the Vespa PX.
Comparison No. 2193370 - 583330 (PIAGGIO)