NPT transistor connection to DSC alarm panel insert with arduino

good evening
I am integrating my dsc alarm with auduino uno and the code / dscKeybusInterface that is in github, and the home platform assists, the alarm panel tells me about the events but it has not succeeded in disarming and remote arming, I have tried to connect the NPT transistor 3904 but it doesn’t work for me, some of you have a connection guide for this transistor
Thank you so much