My TMS is strictly using Provisioning Extension, because I'm running 14.3.2 TMSPE is the only option for me, so I can't provide a screenshot.
However you check by going to: Administrative Tools > Configuration > General Settings, look for Provisioning Mode.
With that said, I'd suggest you consider migrating to TMSPE if you haven't already, as the recent version of TMS have removed support for TMS Agent Legacy mode. If you want to use the most recent versions of TMS and take advantage of the features it brings, you'll have to migrate, if not done so already.
