Thanks for your quick reply. That schematic is (I think) v1.1 of the shield and I have v2.0. Though probably no diff in what I'm asking about.
But you're right, I should be able to see what from the Arduino connects to what on the shield. But that's why I'm posting the question, it's not obvious to a newb.
The shield has 16 pins across the top that line up with the digital pins of the arduino and then 6 that line up with analog. (see img below). And then 6 more that connect to the ICSP.
Pins 0/1 connect to rx/tx. Gnd lines up with gnd. I'm unclear on where the shield gets power. The only thing that I can see is AREF which is analog ref. Is this what powers the shield? I think AREF is by default 5v.