bringit

Hi, I had purchased a number of items from this site a while back, and just getting round to fitting. One of them was an AG6 bell box. My plan was to use this at the rear of the property to replace a dummy box, but to use the internal battery and LED to have a flashing deterrent at the rear. But I cant work out how to do this, or if its even possible? All instructions point towards needing the 12v coming from the panel, but I dont have this connection. Can the AG6 be set so that just the LED is flashing without panel connection? many thanks. https://www.securitywarehouse.co.uk/catalog/honeywell-activeguard-ag6-external-siren-blue-inc-white-cover-p-1973.html