Custom DID

Hi forum
I need to test some custom dialplan for all inbound calls.
I put the following lines in /etc/asterisk/extensions_override_freepbx.conf
Is this the-right-way ™ and right place to make such changes ?

TIA’s for tips and clues.

;This file is /extensions_override_freepbx.conf
#include /etc/asterisk/extensions_override_fop2.conf

[ext-did-custom]
exten => s,1,Answer()
exten => s,n,Ringing()
exten => s,n,Wait(2)
exten => s,n,Playback(hello)
exten => s,n,Wait(1)
exten => s,n,Playback(why-no-answer-mystery)
exten => s,n,Wait(1)
exten => s,n,Playback(tt-somethingwrong)
exten => s,n,Wait(1)
exten => s,n,Playback(tt-weasels)
exten => s,n,Wait(1)
exten => s,n,Playback(goodbye)
exten => s,n,Hangup()