1979 lincoln mark v radio wires?

[79BillBlassV]

Hi, I just bought the original radio for my car to replace a junky Walmart radio that the previous owner installed. I found all the colorful wires, but can't figure out where to hook up the blue with red line and solid black wire. If anyone knows, please let me know. I'm very new to radios and wiring.

 

[stovebolt1]

Power of elimination. If all of the speakers are connected, and your live wire is connected, could the blue be for the power antenna? And the black for ground?