It has its own wire harness. I do not have the adapter to install it into the car. You can go to a best buy or similar and it should be about $15. The wires are all color coded so anyone with zero experience can connect it. As long as they aren't color blind that is lol. Danster is right.. no modifications needed.
If I remember correctly, the factory radio brackets attach to this radio as if it were a stocker. Very convenient.
And the adapter harnesses (pigtails) are available. Might have to shop for one online, but they should be out there. Solder or crimp the radio pigtail to the adapter pigtail and your set. No hacking. Plugs right into the car.
I'm in Marlborough (Central). I do travel through Sturbridge on my way to CT from time to time and I work in Wayland. If that would help meeting you somewhere.