Detailed DemonIVR installation instructions please? 1970 duster

Sorry for being needy but I know almost nothing about electronics. I need to be told how to install this thing. The pictures at demonivr are not helping me understand what I need to do.

Right now I have the instrument panel removed enough that I think I can manage the install. It is still connected to some wires but is hanging loose and I have room to get in there. My understanding is that I need to screw the thing to the circuit board, and connect the wires. I imagine the old voltage regulator must be removed also? What does the old one look like (please be as detailed as possible)? Where do I screw this in and where do I connect it? Has red (12v +), yellow (5v +) and ground.

Thanks so much for any help, this is one thing I can not do without assistance.
Author: admin