Seek  "KDA50"  on  
http://vt100.net/manx/
Get  "EK-KDA5Q-UG-004 1987-11 KDA50 User Guide"
     
http://208.190.133.201/decimages/kda5qug4.pdf
        (Which just seems to prove that the DFWUG is down)
     and
     
http://vt100.net/mirror/hcps/kda5qug4.pdf
        (Which is there)
  do I need the bulkheads and an odd number if wires -
even if
 going directly from controller to drive (say one drive to one port)? 
How big is the drive?  Sounds like an external
enclosure with its own bulkhead. ?
John A.