Bit confused by what you're after. I use awoken iconset, but my portrait desktop (last screenshot) is a bit different. Is that the screen you mean? if you download an iconset just put it in opt/usr/share/icons and use theme customizer to use it. To change manually, they're located in opt/usr/share/icons If you use a pack and want to change them there, then just change in the theme listed. If you want to change hicolor (default icons) so they remain regardless of the theme, put them in hicolor