Adding a JAR to BaseX

Hello! When using BaseX on a server, I only need to add JAR files to the bin/ folder. But can someone point me where I should put the JAR files when I want to reach them from the BaseX GUI. I use the rpm packaged for Fedora 22. I have limited internet access currently ... that's the reason why I can't use my usual work-flow on this. Thanks, Kristian K