How to change Elastix/FreePBX call recording file name format?

Question

linux

Good afternoon,
Elastix and FreePBX have the ability to record user conversations and form wav files like ${ARG1}-${ARG2}-${FROMEXTEN}-${TIMESTR}-${UNIQUEID}.wav
Where ${ARG1} is either a call outside "out", or a call between extensions "exten", or a call in queue "q"
${ARG2} - the number where the call is
made ${FROMEXTEN} - where the call is
made ${TIMESTR} - respectively the time and ${UNIQUEID} - unique call number
The problem is as follows. When a call arrives in the queue and is answered at the end, a file of the form q-1001-9256661313-150145-7318936408.953279.wav is formed, from the name of which it is not at all clear which of the queue numbers answered the incoming call.
What needs to be changed so that, for example, instead of the queue number, the extension that accepted the call is displayed? Or what variable to use to add the number that received the call to the file name?
tried $CONNECTEDLINE(num), $EXTEN, $QAGENT
Elastix 2.5
FreePBX 2.11
Asterisk 11.21