How to add Mashup parameter from URL..?

Dear Experts,

I have received the URL for Mahsup configuration like this below..

I am extracting the parameter for this URL , then it looks like below.

This configuration is not working as expected...

Please share the information how parameter setting is could be done if given URL contain <Selectichoices><Selectoption usecasevalue="1234567"></selectchoices>

Any KInd of information much appreciated..

Regards

Naveen Kumar N