Wiring for original radio

[uprising]

Hi guys,
i removed my bezel and paste some gauges, refurbish the shift indicator and now i try to get the original radio connected. Does the Radio has a cl.30 connection or cl.15? Which color does the cable normally have? Is the wire come from the fusebox or is it going first to the „Headunit“ and from there to the radio? Actually i have only connected the dashspeaker. Can i easly connect side speakers?

I only have a wiring from a 80‘ truck...

 

[Matt69olds]

Yellow is 12v power with the ignition in run or accessory. Gray is backlighting controlled by the dash headlight knob. Brown is a taillight power feed, anytime the headlights are on the display dims (assuming the stereo has a digital display). Orange is constant power used to keep the clock and radio presets in memory, the speaker wiring I’m not sure. I think there is 2 shades of blue, two shades of green.

 

[uprising]

Does wires come directly from fusebox or from the headunit? It seems that the preowner maybe cut the wires or they are somewhere behind the dash...