Based on the link (http://tech.just4sharing.com/Pages/tech/Configuring-SharePoint-2013-to-support-workflow-Management-Service.aspx#.UvzP8YV5GUM)
"Step 23: Give this command "Register-SPWorkflowService -SPSite "http://xxxx" -WorkflowHostUri "http://xxxx:12291" - AllowOAuthHttp
"
How do I located the "WorkflowHostUri" in my computer?