You use the same cable that you use for charging and connecting/syncing the iPad to your computer, you don't use the kit (the kit can only be used to copy photos to the iPad). On a PC you should be able to use the windows camera wizard to copy those photos off, on a Mac you can Image Capture, Aperture or iPhoto
Copying photos to a computer : http://support.apple.com/kb/HT4083
You can't export pics (or any type of file) using the camera connection kit.
How to Transfer Photos from an iPad to a Computer