[kroozebo]

Can someone tell me how to connect my radio?

I have a 1970 Mach1,351C.Great sound,but a little music
on long drives would be welcome.
The radio has never worked.
I had a look and no wires were connected.
There are 2 connectors with 2 wires each on the radio.
One has yellow/black and blue/red wire.
Other has 2 black wires.
Which wire is what?
Thanks.