It will start running automatically as soon as it gets installed.
If you checked in Stinger to evaluation branch, then by default, ePO will deploy it to C:\ProgramData\McAfee\Common Framework\Evaluation\STIN_W649001\Install\0000
If you checked in Stinger to current or previous branch then adjust the file path above accordingly.
Stinger logs will be placed in the form of a html file in a folder that has same name as target machine's name.
Hope this helps...