Bluetooth & Voltage Regulator in Yeti - where to locate 2nd unit?

[richws]

Hi, Have 66 Yeti with stop/start and voltage regulator is located under drivers seat. Passenger seat has sound system amp underneath. Want to fit OEM Bluetooth (to go with Columbus). Does anyone know of "official" or other suitable location for either unit?

 

Many thanks

[richws]

To clarify:

 

Apologies, it's called a "voltage stabiliser": 8K0959663G. 

http://www.realoem.me/Skoda/CZ/YET/2017/779/R/9/919/919022   
Think it's specifically for Stop start.