NL DC25 and Victron Phoenix inverter installation

[rlord182]

I have a National Luna DC25 green battery box fitted in the back of my Ford Ranger Wildtrak. The battery box is connected to my starter battery / alternator for charging whilst driving. When in camp, I use a solar panel to charge the battery.

I want to fit a Victron Phoenix 12/375w inverter so that I can run 240v appliances whilst in camp.

So a few questions for those more in the know than myself:

1. Can I connect the inverter to the battery box using a grey Anderson plug from the inverter into the auxiliary in/out port on the battery box?
2. Do I need to fit a fuse to the positive cable between the inverter and the battery box?
3. The inverter will be installed be no more than 50 cm away from the battery box. According to the Victron manual, I can use 6mm cable for this - is this correct, or should I use a thicker gauge?
4. Do I need to earth/ground the inverter to the body of the vehicle, or is it safe to use unearthed? If I have to earth the inverter to the body of the vehicle, I assume I can just run a cable from the earthing terminal on the back of the inverter and connect it with a lug to any bolt that is attached the vehicle?

Would really appreciate some feedback, as a) I am a newbie when it comes to electrical wiring and dual battery systems, and b) I have searched high and low for the answers to the above questions, and can't find anything definitive.

Thanks in advance!