Status Cue... External Control?

Here's a blast from the past...

I have a Status Cue system that I'd like to trigger remotely via contact closures... I see that there is an "external control" port as well as an "Ext 1" and "Ext 2" port on the facepanel, but can't find any documentation about their function in the manual. Would anyone happen to know if there's anything that I can do w/ these? Remote Macros perhaps?

If not, I was planning on going with a CC>Midi interface and triggering it that way, but if I can save some money...

Thanks!
-Griffin
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