If you provide power to the board it's just a matter of grounding the 'INs'.
DIN is detector in, usually an insulated rail. When grounded it will set the signal to stop. When ungrounded, you will get the approach to proceed sequence. The approach timeout is a few seconds before going to stop.
RIN is the 'red' input. Connected to ground this will set the signal to stop. When ungrounded, it will go back to proceed without the sequence. This is useful for protection against trailing point turnout set to foul.
YIN is the 'yellow' input, when connected to ground, the signal will not show a higher speed indication/aspect than approach. DIN and RIN override it to stop.
TLDR, just connect a switch from DIN to ground.
