OK, because that's not what it said in your question...anyhow, you shouldn't need to "activate" this anywhere, just restart the Splunk instance and you should be good to go. Possible steps forward is to check btool output ($SPLUNK_HOME/bin/splunk cmd btool inputs list --debug) to see if Splunk sees your defined inputs. If it does, you should check splunkd.log to see if there are any problems with the inputs you've defined.
