I have the antenna in the rear deck inside the car. Reception is very good. Snake the cable up the side of the car under the dash and into the storage compartment. Power and aux input are in there, so there is no visible wiring. I velcroed the radio to a plastic "L" bracket, and velcroed that to the floor of the storage bin.

Yes, plug is similar to the old walkman plugs. The plug is perpendicular to the wire when you lay it out.

I have an older version of the Starmate 4. Same basic thing. Good luck. If you need any help, let me know.