Part Two - The Snag
Well, upon examination it didn't appear to be a lost cause. This is the Nav connector (yellow wires) removed from the head unit and the Aux connector plug. The Nav system wiring occupies different cavities in the connector than the Aux input. In that case, I can transfer the wires from the Nav into the Aux connector.
The outer shell of the the Nav and Aux connector have to be removed first. The release tab is under my thumbnail.
This is the Aux and Nav connectors opened up. You can see where the wiring positions are different.
I used a small jeweler's screwdriver to release the terminal from the shell. Press down only enough to release the wire, then pull the wire out.
This is what it the freed wire and terminal looks like.
The terminal is pressed into the corresponding cavity in the Aux connector shell.
The same is done for the second wire from the Nav connector. This is what results.
The outer shell is snapped back onto the completed connector.
Now to get back on track....