I found either Y0 or Y1 works. The important thing is it's a small tri-wing.

Yes, this cable.

My Wifi failed, "no hardware found", but the Bluetooth still worked. I replaced the board, but still no dice. Turns out it was the cable!

My Wifi failed, "no hardware found", but the Bluetooth still worked. I replaced the board, but still no dice. Turns out it was the cable. Lesson learned: try the cheaper part first! Not a total loss, now I have Bluetooth 4.

My rev 1,1 white Macbook was missing the spacer.

I found an advantage to replacing the whole fan housing, it let me clean out the heat exchanger located behind the fan. After three years it was filled with lint, that can not be good for cooling.