You're close to right except you probably wouldn't touch that CB seam. That would cause the vents to invert unless the seat of the jacket is simply way too large for your own. Go to the tailor's tutorials and find the thread on jacket waist suppression. It could be as simple as how you've drawn the green arrow or it could be a little more intense requiring a little skirt reduction at the front through the underseam that is intersected by the pocket.
4/13/14 at 10:09pm