The batteries and electronic components will be located between the rear wheels and behind the seat.   The box will be 24″ x 29″ x11″ (external dimensions) to accommodate the six lead acid batteries.   1x1x.0625 square tubing is cut for the perimeter of the battery box.  (Photo 1)

 

 

The tubing is squared up and welded to the frame base to form the box.  (Photo 2)

 

 

 

 

 

Additional 1×1 tubing is cut and welded to form the box’s angle bracing.    This bracing provides support and strength to the box and to the frame itself.  (Photos 3 and 4)