RED stripe is -ve
there should either be a marker or a shrouded header on both the busboard and the module
if there is a shrouded header then the ribbon cable will only fit in one way
if there is only a marker - maybe a line, maybe the word RED, maybe -VE then match this to the red stripe
NB check the cable is made correctly: there is a tiny triangle on the cable header on the same side as the key - to the left - the red stripe should always match this
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities