MIDI Target Manufacturer(s): Other/Unlisted Maker
Here is a layout for the humble Siel Expander 80! Whooohooo!
http://www.emismusic.co.uk/museum/Siel/EX80/SielExpander80.htm?LMCL=pWUHOj
MAKE SURE TO SET THE CORRECT MIDI CHANNEL!
Fill your boots!
andyv