if you look closely at my pics in previous post, you'll see that the jacks are connected to the vertical flange. that flange unbolts from the horizontal bracket ,but stays attached to jack. the horizontal bracket is attached to the camper's bottom half. the bracket sits 3" out from the lower half to let the upper half clear when down. the brackets are made of 1/4 inch steel. if i had it to do again, i would have the bracket continue down the side of the camper more to limit the amount of flexing the bottom 1/2 does when raising one jack at a time. i just have to do small increments per corner when raising. in the third pic, you can see one of the two nuts(silver color) to unscrew to separate the two pieces of bracket. the other one is on other side of vertical flange.this setup doesn't leave wrinkles in the skin like the old bracket directly behind(grey color) in the third pic and in front of black bracket in 2nd pic.
hope this help. this system works good for me.
wes