Help with zones (how many do i have)

Hey guys,

I have a Concept 2000 system (I'm in Australia) unfortunately the alarm guy i am getting in to replace the unit said its easier to replace vs integrate so am looking at getting a replacement system thinking a starter. The thing that has me is how many zones i have I've don't a count of how many motion sensors i have and i think it's 8 but looking at the unit (pics attached) i have more any ideas?