MAN TGS Power supply

Hi all, apologies if posted in wrong place.
I currently drive a MAN TGS rigid and I am trying to find a 12v that is switched on/off with the ignition, does this exist exist and if so does anyone know where as all I’m finding at the mo are 24v feeds. I have a 12v cool box which currently is plugged into the 12v accessory socket in the passenger foot well which is perm live and I am concerned about forgetting to turn off the cool box overnight etc. Thanks in advance for any help or pointers.

It will switch off when. Power is at a certain voltage

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The socket in the passenger footwell is linked to a battery saver ■■

Cptn_Golfball:
The socket in the passenger footwell is linked to a battery saver ■■

Yep

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Many thanks.

The do say you learn something new everyday.