Looks pretty decent. If I'm seeing it right... I think in a heavy frontal it might move, tweak, but probably won't let go. The bolt that you're using, is that the OEM bolt?
I imagine you arranged it that way so as not to have to hack up your trim piece?
Actually, do you see about 6" behind each of those seatbelt anchor points, there is a weld-nut to which nothing is mounted? That's were the LR Accessories Dog Guard bolts. If you used that location in addition to the main seatbelt anchor, by welding another piece of strip... hard to explain, but your bracket would look more like an L... Anyway, that would help stabilize your bracket to prevent it twisting. And it would be hidden behind the trim panel. Sounds like it's too late for you (off to powdercoat), but I might do that when I make my cargo system.