Fire Lite MS10UD - activate a dedicated Nac

Hello everyone. I have a client who has a Fire Lite MS10UD installed and the AHJ wants to have the water flow only trip the Nac1 circuit (outdoor strobe about the FDC connection) plus the interior Nac2 and Nac3 circuits. The manual pulls and smokes will grip Nac2 and Nac3 circuits only. Obviously easy with an addressable. The system was just installed inside the last year but the AHJ wants it changed now. Now it was approved as it currently works (all Nac circuits tripped when any fire condition happens, but he wants only the water flow to trip the single outdoor strobe; Nac1). Any ideas on how to do this with this panel, I did speak with someone who said they got it working before but they couldn’t remember how they did it. He thought he used a relay DPDT to do it someone but couldn’t recall.

i dont know how to do this sadly but the best i can say is to connect the systems
(im here to learn)