As long as none of the grounds are “switched “ grounds from the alarm. What I mean is with the alarm activated the wire will turn negative and with it disarmed it’s open. There have been insistences where a back feed situation occurs. This is easily corrected by using a diode “ they limit current flow to one direction depending on which way they are installed. I would try and hook it up the way you are talking about using a distribution block, then test each feature and make sure they function correctly. Otherwise sharing a ground location is a common practice and makes for a much cleaner install.
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