Table plugin and relative URL

I have a table plugin displaying various ‘Configuration’ keys (showing associated metadata), that are hooked up to a ‘Configuration’ query variable in my dashboard. I would like to be able to click on the key in the table, which then changes the ‘Configuration’ variable. Is there an inbuilt variable which references the current URL? I don’t want to change the other variables or the dashboard URL, just overwrite the current ‘Configuration’ variable in the URL. Thanks.

Is there any solution to this? Is this the right place to post questions?

Is there any way I can make the question clearer?