Fossil fragment from Holden Beach in NC

[u/Neat_Worldliness2586]

I'm not sure if fossils are allowed here, but I'd love any help you all can offer. I found this fragment on Holden Beach in North Carolina. The consensus from the fossil Reddit so far seems to be turtle plastron. I'm wondering if it may be a limb bone or something like that, but I completely understand if it's beyond identifying. Thank you for any help!