Found it.

/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/

From: Skyler [mailto:skchopperguy@gmail.com]
Sent: Saturday, May 21, 2011 3:29 PM
To: 'sr-users@lists.sip-router.org'
Subject: Modules directory missing?

Hello,

 I am new to Kamailio and have installed via rpm repository on CentOS 5.5 Where is the modules directory located? I cannot load any modules and Kamailio will not start.

I’ve checked these locations but they don’t exist. Is there another package I need to install or where did I go wrong?

/usr/local/lib/kamailio/modules_k/

/usr/local/lib/kamailio/modules/