Ok, it seems like there are 4 wires that need to be spliced into. According to the other installation guides I read for different hyundai vehicles.
http://www.tuixmall.com/info/installationview.do?type=car_shop&pk=59 Maxcruz
http://www.tuixmall.com/info/installationview.do?type=car_shop&pk=60 Tucson
These two seem to be just plug and play. But a little more info, one should be a 12pin connector that connects to the PRNG gear connector, which would show the led lights for the cup holder.
Let me draw up a wiring diagram in a bit.
EDIT - Good news. I find some kakaotalk contact info for hyundai mobis. I'll send them a message and request the installation guide.