Why not drive the front crank on the left side then
A freewheeling crank-drive works best if the motor-chain and the pedal-chain to the rear wheel are on the same side. Although its possible to have them on opposite sides, engaging the motor would cause the pedals to turn. If the chains are on the same side, you can hold the pedals still while powering the bike with the motor.
Whether or not the pedals are forced to always move when the motor is on, this is the big difference between the Stoke-Monkey, and the Urbancommuterstore mid-drives. viewtopic.php?f=6&t=37741