I prefer to use the holes in the frame in front of the rear wheels, I cross the straps from right side to the left and left side to the right and secure to the trailer behind the rear wheels, I use the holes in the frame rails behind the front wheels. Not to the rear of the wheels, behind the wheels, in front of the front shock, and secure straight to the front of the trailer. I have ratcheting tie down anchors on all securing points on the trailer, so I crank it down tight, and leave the winch connected, if I needed it....
I don't like the suspension being free to move about while riding down the road.
Hope this helps you.