[brikar]

Starting from the front of the box you should have a rubber block 1/4 inch and the small plate under your cross bar the second cross has nothing ,the third and fourth has the same as the first ,and the first,third and fourth is what the box bolts run threw to bolt down the box to frame,on the one picture with the 2 arrows you point out gaps there should not be any,the other thing i noticed is it looks like your frame has bean cut off at the end where your bolts hold the box down,it almost looks like your jacks are holding up the box to high in the rear but its hard to tell from the picture