Help With A Lg Gdk-16

[MattSmithy]

Hi

I have a GDK-16 phone system, it used to have a on hold message which was played when someone was placed on hold, this was connected internally via CN22 Terminal Block marked MOH.

We have since removed this device and now wish to go back to just the beeps or some form of noise rather than nothing.

I thought once this was removed it would just reset itself? is it simple to reset?

Any ideas as complete novice