Grimrock

I have defined my own door object, and want to set it so that it can trigger an event or object when it is opened.

Is there a way to set up a "blank" connector for a certain trigger in the object definition, that can be later set to a target within the editor?

Setting the Component:addConnector(event, target, action) in the onInit stage seems to require a full definition and I haven't found a way of setting this so that it doesn't do something unwanted while still being valid.

Well, something has to trigger your door to open. Why do you not trigger in the same moment your script?

Sorry, I should probably clarify.

The door is already opened by clicking on it. (thanks Doridion).
I want it to be able to trigger an external secondary event when the door is opened, but I don't want to specify that within the script as I want it to do different things in different areas.

According to the script reference DoorComponents have onOpen and onClose events.

DoorComponent.onOpen(self)
DoorComponent.onClose(self)

You can add connectors by script if they aren't showing up in the editor
or