Sadly, on the 2012 that plug (on the brake pedal) is replaced with a different set of wires that are all signal level, not 0-12v. On the 2012, you can catch the blue with white stripe over on the BCM (Body Control Module) which is over on the passenger side behind the knee panel for the dash.
I will look up the specific plug you can find the wire on, it is a mess of wires in there and you may need to pull the BCM out a little before you can see the actual wire in question. Just had to connect to it for adding a remote start system and spend quite some time with multiple tech supports before they got me over to the BCM. UG.
Will have more in a little while on wire location... (I am also adding a trailer brake controller soon and will need to connect to it for that too...