Mine is a 64 plate Mega Space. On the side of the centre console in the passenger foot well mine has 2 ■■■ lighter type sockets, one above the other.
The top one is 24v, the bottom one is 12v.
There’s another socket in the dash, next to the passenger pointing middle air vent, that one is permenantly on.
The easy to see socket on the drivers side of the curved console switches on and off with your ignition.