Batboard

I want to run two control heads and a pa/siren modual which I have. question is can I run two A-9s and siren at the same time and is there a special cable to do so. One head up front and the other installed in a camper. The radio will do both control heads but where to plug in the siren/pa cable. If one has a special cable made for the set up please let me know.

I believe the HKN4376B T-cable should work attached from the Siren/PA to the rear control head. My information is this cable was used on the Spectra and Syntor X 9000 rear heads, but I don't have one around to confirm its the correct part number.