There are many reasons you may want to aggregate log files together into one place.  Using Splunk to scrape the log files is a great reason. To do this you need to create symlinks to the Server Log files in a consolidated location.

I choose:

/var/log/mule

Run

sudo mkdir /var/log/mule
sudo ln -s /usr/local/mule-enterprise-3.6.3/logs /var/log/mule/mule363-1

Repeat for any other MuleSoft servers.  Voila you now have a place where your logs are aggregated.