u/TexasActress

Forgot to add pics to the previous post so I deleted to repost:

What would you do in this scenario? Accessing from the treads not really an option…
I have moderate carpentry skills, just not sure the best way to approach this. Every staircase I have encountered thus far has had walls on both sides lol

Edit to add: I’m thinking dowels and some Titebond…?
Thanks in advance for the advice!