How to connect a motion sensor to FPGA?
The motion sensor you have uses 3 pins, 2 for power, one as an output signal that remains low when it doesn't detect motion and is set to high for a few seconds if it detects motion.

All you need is to connect the sensor to the appropriate input voltage and ground, then connect the signal (labeled as "out") pin to a GPIO (general purpose IO) pin on your FPGA.

If you look at the board schematic, the PMOD pins can also be used as GPIO, so you're good to go.