What to put in this spot

Hey fam!

Recently bought a used Wilderness Recon 120.

I noticed these screw holes behind the seat. I know they’re not a huge deal since water won’t get up that high- but I’d like some ideas on what I could install- perhaps using the same holes.

What do you think the previous owner installed here- anything you guys like in this location?

Was thinking some kind of clip- so I can leash some of my stuff down. Or maybe some rails to secure a net or a little storage basket…

Or maybe an umbrella?
Or lights for early morning/night fishing

What would you guys put here? I can always just seal them with goop- or melt some drilled pieces of my kayak- but I feel something helpful would be really useful here.

Cheers guys! Tight Lines!