These are the 12v AC Ice-cube style relays that I use for my signals.
https://www.automationdirect.c...,_plug-in,_3a_-_15a_(78x-z-_qxx-z-h78x_series)/general_purpose,_15a_(781_-z-_782_-z-_783_-z-_784_series)/782-2c-12a
The additional plug-in base offered ($4 each) makes it easy to connect wires.
They have been very reliable, simple and effective.