Ive got a PA4 (PA400) (Response Electronics) which has no personal alarm inputs/outputs however it does have an unused led gap on the circuit board (ie no led , just the holes) however with no places to put a panic switch how would i connect one or make some circuitary which would sound a full alarm immediatley upon pressing a button. Ive already tried placing a switch on the tamper circuit however this only activates the internal buzzer unless the system is fully alrmed, any assistance would be great!

I dont know the panel, but if it is like others you would use the zone terminals on a spare zone and programme that zone as panic or attack.