I am trying to build an escape room puzzle, where someone holds a key fob up to a sensor and a maglock opens, and I went online to buy something that I assumed was ready-in-box but instead they sent me the photo attached which I'm 99% sure was originally a car immobilizer and is now being used as a sensor with attached output. My questions is - how do I connect this to power? I have some knowledge in electrical engineering, enough to recognize most of the parts here but this is the one mystery I cannot solve. The whole thing I assume takes 12V power. Does anyone have an insight into how to give it power, or even how to set it up in general?
In photo: circuit board in the center, sensor (large, black) just off center right, attached chip up top/middle is output (for maglock), coiling wires off the right side is just a singular LED light, and included fobs are top-right. The rest is a mystery.

 

Your could start by asking that question of the seller. Or ask for installation instructions, datasheet or connection diagram.

 

My WAG: 12V power to the unconnected red and black wires on left of picture.
[WAG: Wild Ass Guess]

 

Welcome to AAC!

I'd also guess the red and black partially stripped leads. For better information, contact the manufacturer or seller.

Your posts will be easier to read if you use paragraphs to organize your thoughts.