The Thule EasyFold XT # TH903202 has bike and hitch locks to help deter theft of both. The lock doubles as the anti-rattle device and is located on the shank of the rack as you can see in the attached photo as well as the review video. view full answer...
It never hurts to ask and be sure! You are correct that the Curt Class III Ball Mount with 2 Inch Ball # C45036 does come with the hitch ball already installed. The ball comes torqued on the ball mount to the factory specifications, so it is a step you will not need to do before heading out so soon.
I have attached a review video of this ball mount for you. view full answer...