Some rather good comments here from djk and RobbieD.
Over here in NZ (sorry to muddy the waters), the Burglar alarms and Fire Alarms in a Commercial installation are monitored by 2 different companies.
As far as Fire Alarms go, there is usually a mimic panel out to the front of any place that has an AFA system.
What's more, is the fact that they are totally different systems.
Some burglar alarms may have what is known as a Fire loop.
If you cannot access the connections to effect a connection, it would mean that you do not have a key to unlock the panel and therefore are not qualified for the work at hand.
Just my opinion.