Very nice.
I put the wires over the center bulkheads. It was the easiest way.
The only thing you might want to avoid is to put it through the drive belt. Makes it more difficult to change drive belt (if necessary).
With the diff cover you ordered you will save both belts and pulleys.
I donīt have a scratch on my drive belts.
Only option you need now is the new ball cups. Probably the cheapest and most important option.
Put a drop of oil in the motor bearings regularly. Maybe after every 8 battery pack. Maybe you already knew that.