New trailer. Where to weld the D rings?

Simple physics for the cross strap. Only a portion of whatever tension is in your strap/chain is applied crosswise or lengthwise to the car/load. I use axle straps on the rear axle and front k-member to prevent damage. But on my Demons, due to tongue load reqmts/length of the cars, I have to cross the fronts. The rears stay pulling straight back. Now were a front strap to come loose, and the car tried to wander to one side, I would see it in the mirror and go address it. But I'm more concerned about keeping the car in place in a panic stop hence the direct lengthwise rear straps. Those are what are absolutely critical to me to have lengthwise.

I made some angled 4x4 blocks that the front tires go up against before i cinch the car down. Each block has a metal "flat" flush with the bottom of it that the front tire sits on to keep the block in place. Somewhat of a self-locking device unless the tire were to try to climb up the block and release the load on the "flat." But that's where the rear tiedowns pulling lengthwise keep the front tires from riding up the block so they stay put.

Now when I tow my longer/heavier 69 Charger, no straps are crossed but I use those same blocks just positioned to a different spot on the trailer deck to get the tongue load right.