Most U Haul trailers are equipped with Surge Brakes and WD Hitches are not supposed to be used with them, even if you could find a way to mount one.
Not an expert here, but with the surge brake, the length of the trailer tongue will change as you stop, compressing the cylinder to apply hydraulic brake pressure to the wheels.
I would guess that the changes in length, even if fairly small, would prevent a proper WD hitch setup.
The big thing from U-Haul's standpoint is they want to make towing their trailers easy so any fool, even a Ridgeline owner, can do it.
2015 Canyon SLT, Copper Red, 2WD, CC, SB, V6, Tow, blk leather, factory spray liner, safety pkg, generic roll up bed cover, Tekonsha P3 Brake Controller, Replaced OEM at 70k with Michelin LTX Defender
Please add a vehicle description to your Signature Line in your USER CP so we know what you are driving and can more appropriately insult you.