you can take the optical out of the minime to the jb3. i think the plug on the minime is a toslink so you would need to get a toslink to mini optical cable.
as for the source info, the taper either ran both a jb3 and d8 by sending the optical out to the jb3 and the coax out to the dat. or someone with a jb3 was patched out of the dat. most likely the former.
HELLO! MY name is DUMBASS! thanks tim.
you're going to need a digital converter box to convert the coax signal to an optical signal to run mme>jb3. the hosa box has been tested and approved by tapers. Dr. Phob is currently investigating into the very affordable radio shack converter box.