Ideally, like Magnetron alluded to, it would be purchased with the correct 12 pin connector already on it. (B265LH-12P) If the version designed for the DFF1-UHD is purchased, then you would need to adapt it to the sounder using a 12 pin pigtail. I don't suggest following the method Magnetron suggested because you will not have enough connections for the wires to a 10 pin. If done, you should go directly to the 12 pin using the pigtail. (TZ3-12P-PGT)