How to set Nest Thermostat to control blower without heat
Alright, I figured out why it wasn't working. Had nothing to do with ACC not having a lead.
I was looking at my setup closely and noticed that only 2 wires were coming up from the motor, but it needs 3. 
I noticed that there was a wire coming from pin 3, but it was crimped and didn't run to the motor. So I looked at the speed table and decided I wanted to run the Brown wire up. Connected it to pin 3. Now when I short R and G, the fan turns on :)