2018 Smart Fortwo 453 Prime – pre-wired for tweeters and subwoofer?

Hi everyone,

I have a 2018 Smart Fortwo 453 Coupé, model 453.342, with the 1.0-litre 71 hp engine, 5-speed manual transmission, Prime trim and the original navigation system.

I would like to retrofit the factory-style tweeters and subwoofer. Does anyone know whether the required cables and connectors are already installed behind the interior trim, or were they only included in cars originally equipped with the optional JBL sound system?

Can the speakers simply be connected, or would I need to install completely new wiring?