Hello,
I understand you are using the Translation API on your Web Application for Language translation. While I am unsure which version of the Translation API or the precise Translation Method used, this Doc[1] about the projects.locations.batchTranslateText Method of the Translation API shows that the OutputConfig can be used to define the location of the Output file of the Translation.
Hence, to answer your question, we require information about which Method of the Translation API is in use. And if you are using the BatchTranslateText Method, then the value of the OutputConfig would be the location of the saved Files.