From the Gargraves website. DZ-1002 is the standard momentary push button. DZ-1000, switch motor. Switch motors are designed to be wired, Left and Right, with common accessory (and, or track common), apply-ing AC+ to the center terminal of the switch motor. This allows a metal wheel set, that touches the isolated rail sections, and the other outside rail, to trigger the movement. Auto-non-derail.
Same applies, Ross or other switches. My switches are Atlas, wired similar, using Atlas 6924 relay boards.
Have fun, Mike CT.