GP's from Innocenti are unique in one single respect for the Australian market. They had indicators. They have a unique wiring loom for the indicators, they use a modified version of the LI switch, and they have the Suzuki indicators in common with the Vega/Cometa. The indicators on the front were mounted off the headset, and on a bar on the back. Many thanks to Nevil Cope for supplying this photo and measurements for the rear mount for the indicators.
In the early 80's SIL GP's were being imported back into Australia. These had indicators. There are various wiring diagrams, the one marked "Applicable to your vehicle" seem stop be the version used for Australia.
Below is the actual CEV documents describing the kit used by SIL for the Australian market. Provided by Scooter Restorations of the UK.
This scan was taken directly from an Innocenti original kindly provided by Renato de Pannone, of Casa Lambretta Australia.
The following pictures are of a NOS Rear light bracket available on eBay in April 2017.