Good morning,
I owned a Scout and the setup is very similar. I placed my square motor about 1/4" away from all three sides. Keep in mind that the belt is very flexible (just like a rubber band), thus it allows some leeway as to the distance. Your motor is also very heavy and is not going to move if you have it even 1/2" away from all three sides.
In addition, it would be a good idea to pre-order another belt, just to have one in reserve and also to replace your current one after a year of using it.
I just used the power cable that came with the motor.
I owned a Scout and the setup is very similar. I placed my square motor about 1/4" away from all three sides. Keep in mind that the belt is very flexible (just like a rubber band), thus it allows some leeway as to the distance. Your motor is also very heavy and is not going to move if you have it even 1/2" away from all three sides.
In addition, it would be a good idea to pre-order another belt, just to have one in reserve and also to replace your current one after a year of using it.
I just used the power cable that came with the motor.