u/BlackHotSoup3000

Does anyone what these side fin boxes are and should I be concerned about them? I have never seen fin boxes that mount through the top of a surfboard.

https://preview.redd.it/kule6trm3izg1.jpg?width=720&format=pjpg&auto=webp&s=42fea6dc3fe3c934b295267f9d46ee7e6056e21b

https://preview.redd.it/7s2hum4n3izg1.jpg?width=720&format=pjpg&auto=webp&s=7f48f21b566302589dd98873ad1fbad50b71e21f