Okay, this is fairly easy to do...
You should have the following wires up to your bell box...

Okay, here are your terminal numbers (to the left of the three fuses under
the keypad)...


A - 0v
D - +12v (Permanent)
T - Tamper
B - Alarm

So on your panel, connect the wire in terminal A to the negative on the
battery, and the terminal D to the positive
This will stop the siren from sounding as long as the battery is charged
(probably weeks depending on the battery size and condition!)

Sparks...