Not relevant to the LP tray but another installation tip. Note, this might
not apply for newer ProPride hitches, mine dates to 2014.
On the curb side weight distribution (WD) jack, I found that it was
difficult to get to the inner leg of the WD jack u-bolt. It was directly
under the top lip of the battery compartment which made a straight shot with a socket to the nut on the u-joint a challenge. There was no left and right jack, the u-bolt holes in the jack pad drilled the same for both jacks.
For the curb side jack, I drilled holes in the corners that weren't drilled.
Now, the u-joints are mirror images of each other and fall in the same place
on the frame.
Also, I found that the frame was too narrow for the WD jack spacing of the
u-joints and had ProPride send me some spacers. They actually tipped to the side on me when I jacked up the bars, no matter how much I tightened the u-joints.
See pictures of curb side and road side WD jacks.