OK... I will do my best on this...

The wires into the aux adapter harness have a little tab on the top that you have to push down. While pressing down on those, pull the wire (carefully) out of the harness.

Looking at the factory harness from the side where the wires enter, one side has an arrow on it (that should be pointing to the left) and a notch sticking up.

You should see two rows of 6 slots. Treating the top left slot as #1 for our discussion and the top right as #6, the bottom left as #7 and bottom right at #12...

The factory wires go into #6 and #12.

Your aux cables plug into the factory harness as follows:

If there is a yellow one (or it might be white/red like mine was) that goes into slot #3. The white/blue or gray goes into slot #4. The white/brown goes into slot #10.

If that is too confusing, let me know and I can try to e-mail the wiring diagram to you.

FWIW, I have bluetooth and nav and dsp just like you, but only have 2 wires into the back of my factory harness... who knows...

Good luck!