connector wiring for car radio install in fishing boat

I just purchased a Cassette player with am-fm radio and a matching single cd slave unit from E-bay. The 2 units came out of a 2000 Ford mustang. They are supposed to be premium sound system. My situation is that I purchased them to install in the cabin of my fishing boat.The problem is they don't have any pigtails and other than finding the plug diagram on a web site, I don't know how to hook them up without the pig tail. The plug connector diagram shows power and ground but the rest of the pins are unclear as to weather they have a 12vdc signal or a ground signal. I just want to hook it up to 2 speakers and play some music.
Thanks for any help you can give me. I know that the easiest solution would be throw it away and by something else, but I like the challenge and if someone knew what signal to send to the pins I could solder wire to them and make my own pigtail for the items I needed to play the cassette and cd. I have attached a picture of the plug for the AM-FM cassette player