Passing parameters

Very new to Knime, just trying to pass variable from one node to another .

I have following setting.

I want to use that flow variable as parameter here in the XXX.

What is the syntax that writes the flow variable in XXXX ?

Is there any thing I need to do in green or red area?

I am sure this is a very simple issue. The URL works and gets data w/o variable. I do not know how to pass variable or syntax to pass variable to the URL.