You could always fit saddles end to end in a stick shape and drop them in across the width of the chassis as is. You wouldn't need any mods at all to fit them into the standard chassis then....just as dan suggested above...
The saddle mod arranges them side by side in the centre of the car instead, leaving less space for electrics at the front, but getting the battery weight more central. Yet another tuning aid in the already huge array of tuning options!!!