When i download the SRM 8.1+ Content pack in our test enviroment (8.1.1) there seem to be two agent groups avaliable. One for SRM windows installation and one for SRM Virtual appliance.
You mentioned SRM_logs which seems to be the filelog for Windows installations of SRM. In the agent group vSphere - SRM (Virtual Appliance) (vmware - SRM 8.1+) the filelog is namned SRM_VA_logs and contains the correct path for the SRM logfiles. for example directory; /var/log/vmware/srm Include files: *.log and an event marker regex.