New Blog Tempate hooked up with WHMCS auto-provisining

Hi WPMUDev! We have a WP multisite (subdomain) set up and working, and WHMCS set up to provision sites into WP. To do this we have these two WP plugins, and it's working great:
* Multisite Plugin Manager
* WHMCS Multisite Provisioning

How do I get the newly-created to use New Blog Templates, e.g. offer a choice of template on the WHMCS page?