Adding iam roles to Splunk TA AWS

Given the number of HWF's we have running the AWS TA, we have to hame some form of automation around getting the roles loaed. I have been using the REST API, which works great but I would like to know how I can write this config (i.e. in conf files) to Splunk AWS TA conifg? I ask because we use git for deployment and version control and if I could find how to write these roles into splunk I could do it through git. Another way to ask the question is can I use the deployment server to deploy these roles? Thanks!