I'm not sure if you're talking about the ribbon cable inside the LC, or one inside an external enclosure. In either case, it helps to know that the scsi bus is a truly parallel bus. There are no half-twists in a few lines, etc., to connect additional drives.
The only issues are:
1) The LC's internal power supply isn't very strong, and adding a second drive's load to it is likely to push it over the edge. So if you intend to squeeze a second drive into the LC's pizza box enclosure, the power supply's weakness may prevent you from succeeding.
2) Getting a second drive to fit may be a bit challenging (again, assuming that you are talking about fitting everything into the LC itself).
3) Need to select unique scsi id, take care of terminations, etc. (the usual scsi stuff).