Let's Make Robots!

RAD 2.0 Schematic?

Does anyone have a schematic or diagram outlining the electrical components for a RAD 2.0? 

Where do I connect it?

I have an old droid eris and a RAD 2.0, I want to somehow conenct the droid to the motherboard of the RAD by soldering the end of it's usb connection cable but I am not sure where to do this. I have searched the web for a schematic but have been unable to find one. Any advice or resources are welcome.