I'm just finishing up an analog to digital dash swap and am just finding where everything goes for the digital harness. I noticed that there's two leftover connectors that have the same colored wires for the speakers and am wondering how the hell this works. Unlike my analog harness, there's no long wires that stretch to the back to plug into the 6X9's and my analog harness didn't have these connectors. If anyone can help me out here I would be eternally grateful as this is driving me crazy!

Here's some pictures:

Pass side connector


Pass side 6x9 (with wire snipped from analog harness)


Drivers side connector


and drivers side 6x9 with snipped analog harness wire

 

these color codes should be correct for 89:

 

Digital dash cars had a unique speaker arrangement. They utilized a small subwoofer with a pair of 4x6 full range speakers. Your easiest solution is just to run new wire for the rear speakers.