I know the cord that comes with the M3 is 20 ft - the "map" here: Home Charging Installation shows that the basic cord couldn't reach an outlet placed on the back wall of the garage, assuming the car is pulled straight in. Is this accurate? That chart is for all Tesla's, and of course the M3 is shorter than the other 2. My 240V outlet is placed in the middle on the back wall of the garage, and I'm hoping if I park the M3 on the right side it'll work. If not I'm strongly inclined to buy a NEMA 14-50 extension cord over the Tesla wall charger. Thoughts?