Need to replace optical drive ribbon cable

Opened up my Mac Pro 1,1 yesterday to dust it out a bit, pulled out sled holding 2 optical drives, then put it back into place, but it didn't seem to sit properly. When I pulled it out again, I realized I had pinched the ribbon cable & severed a few strands! Needless to say, the drives no longer work, or show up in System Profiler.

Just wondering exactly what replacement cable to look for, is it a moderately easy replacement, and of course, how can I avoid pinching the new one when putting drives back into place.

Thanks.