We have two search service applications - one that searches our local SharePoint sites and another that searches through a fileshare. I would like for our enterprise search center to only search for files from the fileshare; however, it seems to be also searching our local SharePoint sites (which I assume it's getting from the other search service application because the other one is never set to crawl the local sites).
How can I force the search center to only show results from the search service application that crawls the fileshare?