How to detect multiple 12V circuits

I have an alarm system that I'm trying to hook up to Home Assistant. I'm going to be wiring up a WiFi relay to arm/disarm using the input pins on the board, however I'm trying to figure out a way to detect arm/disarm by the keypad.

The alarm has 2 output circuits I can use. In the manual there's an example of a siren hooked up to the output circuit.

I've read examples of people repurposing WiFi door/window contact sensors to detect closed circuits, but that would mean I would have two individual battery-powered contact sensors which seems a bit wasteful.

I was hoping there's some sort of sensor device that can be powered with 12V and have two "contact sensor channels". Does such a thing exist?

https://preview.redd.it/5ji6q68qqz2b1.png?width=2190&format=png&auto=webp&v=enabled&s=2565fa72fcb49e094b00bbb120c5ff52547a6be2

Submitted by longzheng

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