Adding Aux imput to Delco AM

[Silverado1979]

I've got a 79 delco AM only stereo that I would like to add an aux imput to. I found guides, but they are for am/fm radios. All I really need to find out is where the left and right channels are and the ground posts. I cannot find any diagrams for my particular stereo. If anyone has done this mod, or has a diagram it would be appreciated. Thanks, Joe

[VileZambonie]

If you are googling it the word is input not imput. http://www.instructables.com/id/Adding-Auxiliary-Input-for-an-mp3-player-to-an-O/