There is a little test button top left, you can see it in the pic and it doesnt work.. I guess I could cut and add a button on the wiring by the jpac I think its pin 7 for the coin mech if I remember correctly.. I think it needs 12v like you said.. I guess I could add a third party coin mech if I want to keep it authentic as a last resort..
There is another button inside the door which registers as F1 on the Jpac, ive tried mapping this to what was the 5 key and it does work but means keeping the door open and dont realy want my lad puting his hands in and pushing buttons inside as a health and safty point of view