Sawblade54

Hi Folks I just put a hitch on my Venza through U-Haul but they cant find a harness, Note im not pulling a trailer, I want to add my hitch mount cargo carrier for our little handicap scooter, It only weighs 80 LBS. its 60" wide and with the turn signals so low it hides them. I do see E-trailer has one but im not sure how hard it will be to install, since Toyota doesn't show a harness either, I get no help from my dealer. Has anyone added a harness?