When it came to installing the cable, it was too short (my fault), and there wasn't enough space between the master and slave ends to reach both the DVD drive and the hard drive. The only thing I could do was install the cable backwards and twisting it quite a bit to make it fit.
The upgrade works, but reading the manual for the hard drive I replaced (10GB Seagate U Series 5), apparently there is a specific way you have to connect the cable.
I don't have that option, so the question comes down to, will my drive performance be at Ultra ATA levels, or is it still performing at original ATA speeds?
Is there any way I can test this (benchmarking software for Xbox)?