When I try to boot, BIOS doesn't recognize my drive. Could I have killed the drive? My SSD is recognized fine, so I don't think it's the controller on the MB.
Have you tried the drive with the cable plugged in correctly, with a new cable and power cable and using a different port on the mobo? The idea being to change everything other than the drive and see if the drive is recognized.
john_VanKirk is right about the pins, to the best of my knowledge. There may have been enough physical damage to the mobo or cable connector to render that port / cable useless.