no I have all the codes and I know how to get in and out of engineering mode as I had to open the panel briefly before as the battery was late being delivered. so installed it a few days later, the installer used on of his own on the day but it was his spare so couldn't leave it.
I have a galaxy g2-20 installed at home and would like to add an internal sounder.
I have opened the panel and it has a loudspeaker negative on the left side of the board.
where do I connect the positive terminal to??