Modular Synth Panels

OK, guys and gals -

I came across this "Synth Systems PB-912 Tie Lines" mystery panel in the bottom of my briefcase where it'd been contributing to the case's total mass for a couple years.  It must have looked interesting on the screens of the Airport scanning thingys, but no-one stopped me.

I can't remember who gave it to me - Scott Deyo?  Dave Wellington (in the way-back)?  

Will and I, with help from the Wongster, have been trying to figure out what this is.  We have a theory - but does anyone here, in fact, know?  And how to build it?

Thanks, Bill and Will