BUT why not just do the whole thing while they were at it? I am sure there is a reason but...........
They are drains to feed water feature pumps.
They don't have to be in the floor of pool.
I have 8 in the wall of my pool.
Based on the steel picture, back a ways, I'm not sure if they tied these off, or relied on Gunite crew to align them.
beautiful -- and I used to think the cement stage was ugly, I've really come a long way - ha!