Make sure the SP is set to receive on the same MIDI channel that Cubase is sending.
Also check to make sure "echo MIDI" is engaged on your track in Cubase.
Not sure what kind of problem you are having with the manual. Most of the Moog manuals cover the material pretty well.
Voyager EB #165, T3 #292, MF-101, 102, 103, 104SD, 104MSD, 105M, 107, 108M, MP-201, VX-351, CP-251, Frostwave Fat Controller.