-> User comes to index.jsp
-> Based on need, she clicks on either 'New Connection' or 'Recharge' or 'Disconnect'.
-> Depends on clicked link, you take user to different/independent JSP page. Use Servlet/Controller to display particular JSP.
Those are two entirely different web pages. They can go in different JSPs. And of course they have a different path for submission.
The time to put two forms in one JSPs is when they both get displayed. That's when you use a form id/name and point to a different path for submission.