Ability to apply a Jira Integration Template to an EXISTING Jira Integration but only have it update the URL and Jira Login/Password settings

We had a very large number of Jira Integrations created before we had central administration of our Aha application. I need to apply a Jira template to these integrations so that the URL and password can be managed from a central person, but if I apply a template now it will wipe out everyone's selected Jira Project and Mappings.