I don’t see anything on the body of the stereo that would tell me which speaker wires are + and which are negative. There isn’t anything on the speaker wire plug that identifies what’s + and what’s -. Anybody have knowledge on this???

Other than ‘phasing’, I don’t think it really matters. Try it both ways and see if one sounds better to your ears.

Blaupunkt labeled the input on the back of the radio. The plug is set up so you install correctly. Top pins are positive and bottom is speaker ground. Channels are not marked right and left just I & II. Thinking I is left and II is right

Thanks Mark, that’s perfect.