Installed a new winch on my old trailer today

My trailer hadem on all 4 corners. What do I need to know about the D rings?
They fit down in the stake pocked and pin in, which gives you a D ring on the top.
They are different sizes so measure you pockets.

https://www.amazon.com/Mytee-Products-Trailer-Flatbed-replaces/dp/B07B3SDDK4/?tag=fabo03-20