ZBrushCentral

How do I close a curved hole?

Hi! I’m working in a model and I want to close a curved hole, which is the easiest way to do it? I already tried with the option close holes in Geometry menu, but it doesn’t work as I want.

This is how it looks.
ZBrush_2018-10-08_20-24-24.png

And it should look like this.
firefox_2018-10-08_20-27-25.png

I want to learn how to build a curved wall to close it when I use the Trim brush basically.

Thanks!