My trailer dimensions are: 48 ½” W X 74” L. The mounting is done with “J” bolts, one on each end and on both sides (see attached diagram). And as far as I know, the dimensions are the same between the military and civilian trailers, but you should confirm that with the experts.What are the dimensions of the cap? Wondering if it will fit post WWll Bantam trailers too (Almost positive the Civilian Bantams are the same size as the WWll trailers)? How is it secured to the trailer? What kind of bracket are you using to hold the shovel and is there one holding an axe on the other side? Sorry for all the questions.