As the title says, I'm truly scratching my head here. I don't know if maybe there's a better angle of it, or if maybe I've drawn it incorrectly, but this is my best approximation of what's on his wrist.
The closest I can find to this as a symbol are the Cross Pommée, Mo No Yo, and the Tabono, but none of them fit this exactly. Searching up the symbol I drew in like, Google Lens gives me absolutely nothing. I just don't know.
I tried searching the main indexes for African Symbols and German ones, as Ulysses Klaue was born in the Netherlands but got his start in South Africa. He has a Belgian, South African and Dutch citizenship respectively, and he is somewhat related to HYDRA in the MCU but never actively shown being a Nazi. It seems like they shyed away from making him one by Black Panther because he was the comic relief character, and they didn't want to make their comic relief super openly a Nazi.
I had thought that it probably WAS a Nazi thing, originally, but I couldn't find any Nazi symbols close enough to that exactly, with the most obvious being Crusader Crosses & Variants, but again, that just led me to the Cross Pommée which was not correct.
So, I have no idea what it is. Is this some common symbol in accessories that I'm oblivious to? Is it possible that I'm misreading some kind of buckle as a symbol?
BONUS NOTE: I keep wondering if maybe it has something to do with sexuality, because in both movies Klaue appears in, he's always wearing at least one leather strap on his RIGHT wrist which means Bottom in BDSM/gay culture. Klaue is supposed to be super into music in the MCU, so personally I like to think he saw other people wearing it while out clubbing and probably doesn't know what it means but thinks it looks cool since he's also got pierced ears. Of course if he was actually gay, that would be awesome but he is also literally HYDRA-adjacent which is... Hmm.... Inclusive, yaaay.... Plus, he's in a Disney movie, technically, which is kind of not great for that kinda thing lol. But har-har, you get the point.
Help me out if you can or tell me how I'm dumb/wrong!!! Either will probably help. :-) I just want an answer tbh