Making new light flash

My alarm has an light flash output with an onboard relay, but it doesn't seem to work anymore, I've checked all the connections and everythings connected so the brain must not be sending a signal.

 

I want to make a new light flash connection, I've looked at the ones on the relay page, and was wondering if it would be possible to just run the positive siren wire to the park lights positive wire so when the alarm chirps, the lights will flash twice, and when the alarm is set off, the lights will stay on until the alarm is disarmed. But with this make the siren go off when I turn the park lights on?

 

If I use the  "Adding Light Flash with Siren Output" in the relay's page, what exactally is the circle with the X and L ?