The bread board view from Fritzing shows the connection schematic. Both models (DiffBot and Remo) use slgithly different hardware (e.g. motor driver) which you can see in the following:
=== "Remo"
[![Remo Fritzing]][Remo Fritzing]
[Remo Fritzing]: /fritzing/remo_architecture.svg
=== "DiffBot"
[![DiffBot Fritzing]][DiffBot Fritzing]
[DiffBot Fritzing]: /fritzing/diffbot_architecture.svg