Proper location for images

I'm using my component as the heart of a "package" of joomla extensions.
I'm wondering if I'm putting the imagery in the wrong place?
CC asked me for the image and I gave it and it renamed it ( fine ) and put it as a folder in /administrator as shown.
I've heard that all images & js should go in /media so I made a folder for that matching the layout I see in the CMS core files.
but you can't use "/media/xxxx" in .css cause if the joomla site is installed in a subfolder it will fail.
because / won't be the installs / .
So whats the proper way to do this?

Images and Icons for the Administrator portion should go to folders in the administrator (backend) part of Joomla.

all images/ js/css should go in the media folder when it's for public frontend use.

AH! ty walt.. that clears it up entirely