Where is the odometer wire located on a Mustang gt?

Hello I have a 2009 mustang gt. A couple of months ago my odometer quit working so I had to drive three hours just to get the work done. Then when I got there it was fixed in five minutes because they said the wire somehow came loose right from the transmission. Now this has happened again and I would like to fix it myself if it means I dont have to drive 6 hours both ways. I need to know exactly where on the car the cord plugs into the transmission. Thanks so much