I have a 2012 M37x and was wondering if anyone knows where I can tap into a switched power source that is only hot when the vehicle is running. I was hoping the fuse box right next to the battery would provide it but I can't seem to find a switched power source. Has anyone looked for it or found it somewhere else and can provide some guidance? Thanks!

I searched and searched and I ended up running a wire through the firewall behind the battery and to the fuse box in the driver kick panel.