Hello Euroline connoisseur! I have a rather annoying problem here: In the Euroline transit of my parents a second onboard battery for lighting, Eberspächer and cooler is installed. Unfortunately, the second battery is obviously not properly wired. It is charged while driving, but the current of the consumer is also taken from the starter battery in stand. From both batteries thick cables go under the floor covering of the Kardan tunnel in the direction of the center console. int only one line to disappear in the center console. So somewhere in between the line of the on-board battery has to end. Maybe in a small box behind the switch lever? Before I take out the whole floor covering to track the lines I would be very grateful about a few tips!