cargo light on a 2004 silverado

I have installed a camper shell on my 2004 silverado ext cab, and I would to tap into the rear cargo light. I could just push the cargo light switch on the dash and the light would go on inside the shell. I would like to tap into this wire somewhere down by the seats. I can only assume that this wire runs along (under) the wire trough under the driver door. Could someone supply the color code of this wire? Thanks

looked like the trigger side is dark blue/white tracer. orange supplies power