Hey I'm doing the same thing! Atleast, I think I am. I'm having trouble following your thread.
Here's what I've figured out so far. Since that pic is my harness.
I broke the 3 piece connector and separated the green and white wires. I plugged the green wire's spade into the parking light socket from my my 04's harness, and I took the white wire which is the ground, and did the same thing. Works like a charm.
Right now its secured with electrical tape, but I'm going to my local dealer this weekend to see if i can buy the connector from the 06 harness to plug those 2 wires into, so it doesn't look all ghetto with electrical tape.
That leaves me with the red wire, which is the positive wire for the blinker. The white one is the ground for both so I figure that base is covered. I'm still not sure if I'm going to add the second blinkers yet, so i don't know how I'm going to attack it, but more than likely, I'l just splice it, if I do go that route.