Years ago when we used to use alarms with global tamper, I'd always use a continuous connector strip and wire the tampers in zone order, if there was ever a zone tamper fault you could quickly run along the strip with a voltmeter, when 5V was measured you could see what tamper was open without disconnecting anything. EOL wiring is much easier now, you just look at the screen and it tells you...
Had one only last week and it took seconds to locate the problem zone, it turned out to be a deliberately cut cable to a PIR.