The installation shown in BeerGuy post is incorrect. The vehicle is equipped with a IBS (Intelligent Battery Sensor) sensor able to measure charging and discharging currents to determine the state of the battery. Please refer to the relevant page from the Owners Manual.The permanent Maserati CTEK batter tender eyelet physically gets bolted to the battery post. Extremely secure.
I attached a picture for you to see the smaller red/black tender cable connection.
The models are different, but the connection to the batteries is the same. What is shown on your picture is definitely negative pole. The positive pole is closed by the box with high-amp fuses and is more close to the tail of the car.Its confusing comparing different models. The posted picture is of the positive connection (red end). The negative is not shown which is where the IBS sensor is located near. I had the Maserati service department install when I picked up the car new.
You are correct. I understand what you are saying. I found to your point Maserati issued a service bulletin to change the connection location as you indicated. Mine was installed prior to the bulletin. Interesting my hardcopy manual doesn't show that schematic, but the iPhone Maserati app does.So your installation made by official dealer is absolutely incorrect and doesn’t correspond neither to Owner’s Guide nor to technical/electrical documentation for the car.
Please find below the picture of the correct installation of negative wire for CTEK tenderers/chargers, as well as the view of the CTEK connector inside the trunk.