I did something similar when I got my extra drive, I took a typical stranded 16g wire, pulled out one strand and threaded it figure 8 around the two terminals. Well, after about 3 months the empeg would occasionally pull up the "no hard disk support found, contact support" for just an instant when the "Risky Business" Penguin would zoom by. It would stick on the logo screen (Jeep in my case).

Pulling out either other drives from the drives from the cable would make it work normally (except for missing songs/playlists). It could be something else, but that was the most logical point to check. Just seeing where the easiest place to get an extra might be since my Jerry-rig didn't work.