Hi regarding the workings of it ..Both motors are 12 volt and both have there own battery .The motor on the left is connected under the normal way (through the pod and the push switch on the left handle bar ...) The one on the right is controlled through a relay and switch under the seat .To start it I have fitted a push switch on the right side of the handle bar (The one that is used for the horn...)
They can be used separate or both together ..The idea is that when you come across an incline you can press both switchers to give a boost ....And I have tried it and it works great ..
The other way is use the C5 as normal and if the motor starts getting hot you can switch over to the other side and carry on ...