The Dx/Sx sides have the interlocking millings in the front wall. The front and back walls,have the interlocking millings for the Dx/Sx sides. For attachment to the bottom,there is no milling
The Dx/Sx sides have the interlocking millings in the front wall. The front and back walls,have the interlocking millings for the Dx/Sx sides. For attachment to the bottom,there is no milling