Mine is much like jnealand. But instead of small chain, I ran a single 16 AWG wire thru everything in a big loop. I drilled small holes thru my pvc and things. So the wire actual goes thru everything. On the few items I did not want to drill, I used small U-bolt cable clamps for steal cable. I run 12 vdc thru it and back to an ice cube relay. The relay is connected to my doorbell. So if anyone breaks or cuts that wire, my doorbell rings repeatedly. This year I got a big 8” fire alarm bell to use for it, so the neighbors and thief can hear it too. Just in case I am not at home. I don’t know if it worked, but no one has stolen anything since I started doing this. Maybe the neighborhood is just getting better.
This year with all of the controllers I am adding. I use the enclosure that RJ recommends; I will just run my alarm wire in one of the wire holes and out another.
Jeff