Technical Permanent 12v supply

[Patiopat21]

Hi I am newbie to this site I have got a 2014 Autotrail 3ltr automatic and I would like to fit a Bluetooth for my tyre pressure gauge which is built in to my snooper but it needs a permanent 12v supply where would be the best place to get it from.

Thanks Patiopat

 

[Techno100]

The battery
https://www.fiatforum.com/ducato/357045-x250-cab-12-volt-socket-permanent-live.html?p=3543599

 

[shotgun]

there are lots in the fusebox