Looking at the shotky i would say its a brushed setup with a brushless ESC :P
Anyway, that is the most common setup i see with lrp ESC and the one i use. The wires are almost as heavy as the esc itself, so it makes sense to put them close to center of the chassis. The sphere will hang out a few milimeters, but so far that hasnt been a problem.
I had problems with the belt rubbing the capacitor, so i moved it to the right of the Sphere