There is not much of a schematic here.
Pin 2 of the Aibo battery terminal (CLK) is connected to Arduino pin A5 (+logic analyzer)
Pin 3 of the Aibo battery terminal (data) is connected to Arduino pin A4 (+logic analyzer)
Pin 6 of the Aibo battery terminal (GND) is connected to battery GND, arduino GND (+logic analyzer ground)
Pin 1 of the Aibo battery terminal (VCC) is connected to the positive terminal of the battery
That's everything. I am not using any pull-ups on the clock and data lines because I kind of expect this to be done in the Aibo who is serving as the master. Not sure if that is a wrong assumption. I did try adding 4.7k pull ups to 3.3V and it didn't change anything.