The Bionx motor system has a lithium-ion battery that needs to be mounted somewhere. I propose to mount it under where the basket will go.
Bionx makes a removable battery that fits in a special double level rear rack. We might get a rack and cut it up and use it to mount the battery below the main tube.
Here’s a look at the Bionx battery carrier rack.
Here is the connector that mounts inside the rack.
With one wheel removed, you can see the battery more clearly. I don’t want the battery under the seat, as there is some remote chance of fire, and better to have flames behind you than under you!
You can download the Sketchup model below. (Uses Sketchup 2015 or 2016)