Disconneting battery to install PIAA 520a

[BGA23]

I undid the neg terminal of my battery so I could hook up the PIAA lights I am installing. Apparently my alarm has a back-up battery that kicks in when the battery is disconnected, so the alarm goes off. Other than dealing with the alarm going off as long as it takes me to hook up the pos and neg wires to the battery for the lights is there anything I can do so I don't go half deaf and piss off my neighbors?