OK that looks easy to fix.
As you say, getting a towing ring fitted to your trailer is easy. All ours tend to be welded, but that two bolt mount looks pretty substantial too.
Use high grade bolts though!.
To hitch to a ring with a drawbar - it will need to gain what's known as a hammer strap on the top of the drawbar.
It needs to go in a sort of Y shape like the picture I showed before (red drawbar).
It doesn't matter if the bottom bar is straight and the hammer strap goes above it, as long as you have something to lock the pin in with - top AND bottom.
The pin has a collar at the top, and the clevis pin at the bottom.
Your options then:
1. Ignore this idea of using/changing to a pin and ring for your trailer, and just fit a standard towball to your drawbar. Cheap, not as effective or as tough - but will probably do you for a while.
2. If you have ordered the tractor from a dealer - see if they'll just swap out the drawbar supplied as standard for one with a hammer strap fitted.
3. Fit a hammer strap yourself - but you'll probably need a decent workshop to drill the drawbar (tungsten drill) if it's not already got the holes.
Hammer strap can be bought most places, but you may get a good price from the supplying dealer.
A quick search here found a US site selling them - though this does look expensive. We'd expect to pay maybe GBP20 or GBP30 for one (c.$50) e.g.:
Order Hammerstrap, Drawbar A-3545 -8913 for tractors for sale | Best price 95. | Hitch & Drawbars at TractorTool
I guess it's now only a choice you can make.
Over here, all our trailers for proper tractor towing are pin and ring.
I have gone a step further on my NX6010 for using the ring towed trailers with a "pick up hitch" as you can see in the photos of the back of my tractor...
Unless you haul a trailer a lot, or are constantly swapping them about (like we do) - it's not worth it...
A neat animation of how one just like it works is here:
Dromone - Mechanical Pick up Hitch - YouTube
Advantage is that you can hitch up/unhitch safely whilst staying in the cab!
Hope that helps,