The following are the steps to configure Module Registrar :
- Extract registrar.zip into [WHMCSROOT]/modules/registrars/ directory. Make sure srsx.php is located in [WHMCSROOT]/modules/registrars/srsx/srsx.php directory too

- Login to WHMCS admin page, and then go to Setup – Products/Service – Domain Registrars menu

- In configuration page, you will get registrar modules list that installed in WHMCS, choose Srsx module and then click Activate button

- After that, click Configure button to configure the module. Input the Username, URL, and Password in Domain Management System. If did it, click Save Changes button

- Configure the domain that would be using Srsx registrar by set the domain pricing, go to Setup – Products/Services – Domain Pricing menu

- Choose domain extension which you would connect it with Srsx registrar module. For transfer requirement, give a tick at EPP Code checkbox

- Finish.