Ah well then you are right on the money with a CF 2 SCSI card, then just use a Y cable at the molex, (of the Custom 34pin to 50pin scsi adaptor/cable) assume you have one or made one 
, basically the PDS card would consume what the original hard drive would have. maybe the pds card would be happy with a +12/+5 input from the molex and doesn't need any other regulated voltages.
, basically the PDS card would consume what the original hard drive would have. maybe the pds card would be happy with a +12/+5 input from the molex and doesn't need any other regulated voltages.