Had the headlights out, so came back to this as the duct was staring at me with them off the car.
My thinking was for it to kinda follow the headlight when I cut it on 4/18 above. Followed 400Eric's advice and cut it straight across. The side by the radiator is untouched.
Sorry for the way overexposed images. Needed to capture the detail on dark, black parts and the sun was going down by the time I had the lights back in.