u/Silent-Razzmatazz-65

Hi everyone! I recently bought an old car stereo for my 1993 Volvo 240 — a Volvo CR-702.

I wanted to test whether it works at home, so I spent several hours trying to find information about the wiring and what each wire is for. Unfortunately, I only found diagrams for versions that have a connector, while mine simply has wires coming directly out of the radio.

I believe these wires are original from the factory and that nobody has modified them, since the soldering looks factory-made.

Could someone please help me identify which wire goes where — speakers, antenna, and power?

Any help would be greatly appreciated!