Hi Nickda_Corfu and welcome!
You could use qRules SubmitToSharePoint which lets you specify the SharePoint URL as a parameter in a rule. We are posting a free trial for the newest version (2.1) in a day or so. qRules is packed with other features and it's super cheap with a 30 day money back guarantee if you aren't fully satisfied. Qdabra pays for this free forum and this is how we make money to support the forum - by helping you save time. :)
Of course, the other option is to write code yourself that does this - it would probably be 10-20 lines. We could do it for you but it's cheaper to get qRules and coding in the form is a bad practice because it costs more to maintain across separate XSNs.
Note: for advanced InfoPath hackers, you can modify the XSF to add xpath lookup for calculations and filter functions. However, unlike those (which can be manually added to the XSF) I don't think you can add an xpath parameter lookup to the URL in the XSF. Might be worth 10 minutes of trying though.