I just added the Torklift box two days ago the second HERE above. The box came with self tapping screws that worked like a champ put one in each corner of box. They also supply two angle pieces to help mount where the frame is wider. The one I bought was 35" long and had enough room for two batteries and I mounted a cut off switch (Harbor Freight Item). I had room to recess the switch in the side of the box also so all the wires are inside the box. The pictures on the post above the second HERE show the switch and box. I also added some bars to the frame to hold the WD bars.