Do you have a question about the Blaupunkt NASHVILLE R24 and is the answer not in the manual?
Connects the positive power cable to the car radio, detailing the use of flat plug connectors.
Details on connecting the ground cable to the vehicle's chassis for proper grounding.
Connects to the pre-amplifier output for improved sound quality.
Connects via the equalizer/amplifier/booster's speaker outputs as per diagram.