VRSCA Siren location

Hi all I just bought a 2004 VRSCA and it’s my second VROD. This is customized and I love it. The bike came with a security system and the old style button key fob. I want to add the chirp or siren to it but when I removed the rear seat, there is barely room for the TSSM. Can someone confirm where the siren would go on a VRSCA?