New trailer. Where to weld the D rings?

The four indicated, and two at the back, inside the ramps, a couple on the tongue, if no winch or toolbox (I HIGHLY recommend a winch, I made do with a 2500lb, got a nine ton now), and two on the middle on each side, to tie down something other than a car.
I did see one wood deck with the d-rings bolted tonight. I don't recommend that......