mopar radio questions

Pishta got it about right. There are two wires one +12V (orange IIRC) other is (pink IIRC) that is the radio dash light, it goes in the top of the chassis
The chassis is the ground.

There is another connector with 2 wires (green IIRC) that has two wires, Speaker + & -

Plug the antenna in, hook up the 12V and a speaker and start rocking, or not.