How do I wire in a lights on alarm buzzer?

Ah yes I see Matty but my plan was to have the buzzer sound when the lights were on and the door opened. Otherwise the buzzer will sound if I want to park on the road side with side lights on but not running the engine. I hope that makes sense?

 

The only issue i had was i have a walk through so if i pulled up and went in back for a brew the door would not be opened

 

Mad how things appear. I been thinking of doing this on my bus. I noticed that my Jake Brown bus has it.