this may be a really stupid question but here goes:

I have upgraded a server to debian 8 and have installed freeswitch using the latest branch

https://freeswitch.org/confluence/display/FREESWITCH/Debian+8+Jessie#Debian8Jessie-latestreleasebranch:

My question is how do I activate other modules?  In previous versions I would have amended the moudules conf file and re-compile.  I can't find the modules file in this install 

thanks

Matt