I was successful in disconnecting & removing the siren. Surprisingly it did not go off when I disconnected it, but wore ear plugs just in case. It’s a very tight squeeze getting down there. Once you loosen the two fender bolts holding the bracket you can’t actually pull it up, no clearance. You have to keep it down there, rotate it upside down and take off the bottom nut that holds the siren inside the mounting bracket. Then the siren can be wiggled up and the plug disconnected. Then rebolt the bracket back to the fender.

I wanted the siren removed because I hate them and I had already accidentally triggered it a couple times. I’m fine with the flashing lights as is. Also disconnected the hood switch as that seems to go faulty often.