@Caden makes a good point about no down pressure and possibility of hitch rising. If your moving trailers around on a relatively flat area or uphill, not a problem. Going downhill, keep the hitch below the centerline of the axle and run a chain from the top of the triangle to that socket you pointed at with the arrow in your pic.
I have a chain attached to the head of a toplink pin for that purpose. If I’m just shuffling trailers around the shop areas, I don’t use it. If I’m taking the off-road trailer out to the woods, I chain the toplink on the trailer mover triangle to a shackle on the tractor drawbar. As long as you keep the trailer hitch below the centerline of the rear axle, there’s never much tension on the chain.