It can be difficult to find the wiring connectors on large trigger zones. Unless the zones are scaled, the connectors remain the same size and there is nothing to indicate which side of the zone the connectors are on or where. For very large trigger zones, it can involve a bit of a search which can be a bit inconvenient.
How about adding an 'X' to the side of the trigger zone where the connectors are located, where the center of the 'X' is the location of the connectors. The X resizes with the trigger zone.