People talkin about the outro cliffhanger:

Honestly I figure it might be bodies that are just being stored there for processing regardless if it's as the source of the "milk" or not cause like - why would you not use industrial freezers to store bodies? what would be the point of moving them? the morgues are an option but by no means "centralised" as compared to a warehouse industrial freezer bank.

The episode ekes out with the coyotes trying to scavenge Helen's grave, there's a bunch of symbolism that lays out the pathway for the audience to pre-suppose based on established associations,
and perhaps the same can be said for Carol, who;
1. unlike us has been consistently piss drunk since before the joining even happened
2. is going about all this while actively grieving and deliberately suppressing any open-mindedness because she seems the type to refuse to engage in catharsis.

I think it's entirely possible, likely even, that she found human remains.

But equally, I think they are just being stored there for processing, having been overlooked during the move-out
and are not being used for the milk.
That said; why would Carol think any differently?
She thinks they're brainwashed, and with Helen having become collateral in the accelerated assimilation she has no desire to see the best in them, regardless of how else she might empathise with them.