CT10FT05 Fiat 500 Bluetooth Installation SOT Adapter. The SOT series leads are designed to install aftermarket hands free kits such as Parrot or TK30 or Nokia with ISO connections. They are provided in two parts, one converting Car Wiring loom to ISO the second lead is then ISO from the Car Kit and plugs back into the Car Radio. Other Devices with ISO connections can also be installed with these leads. See Additional Information for Vehicle Applications.