This is the minimum you need do to enable MTO. By default the enterprise server uses the SIT DFH$IVP. The startup lists, groups and resources used by the enterprise server will, therefore, be those defined by DFH$IVP.
If you want to set a SIT that has a $ (dollar) character in its name you have to escape the $ character, for example MY\$SIT:
Note: You can disable or re-enable MTO by unchecking or checking Mainframe Transaction Option enabled, then clicking OK and stopping and restarting the enterprise server.