I took a second look at your pic just now...
On closer inspection..
C to 1
A to 2
B to 3
I can tell because, and I can't believe I missed it the first time, the terminals on the solenoid coil have labels with the wire color indicated. It's upside down, but you can clearly make out "Brown" on the right terminal, and "White" on the left. That only leaves the faded yellow wire which must go to the butt splice connector..