X5 12v feed for freeveiw box
 

Hi, i have fitted a freeveiw box to my tv module and its great, but at the moment its getting power to it all of the time (unless i pull the inline fuse out)
What i need to know is where can i get a 12v feed from thats only live when the key is turned. I was hoping to get a feed
from the rear fuse box but they are all live when the keys not in. Cheers