the website of mrtg says to use the cfgmaker with these commands

cfgmaker --global 'WorkDir: /home/httpd/mrtg'
--global 'Options[_]: bits,growright'
--output /home/mrtg/cfg/mrtg.cfg

However i do not have a /home/httd or a /home/mrtg i do have httpd service started and running but thats it.
Do i need to make them? also whats up with the thing? what should that be?
Apache is looking in /var/www for me