As you probably know, the optical drive connects to the logic board by a flexible flat conductor (FFC) cable called the ODD cable.

On one end of the cable is the standard JAE KX14, to plug into the drive, which should have a KX15 connector, and the other end of the cable is a different connector to connect the ODD cable to the logic board.

This is a picture of the connector that the drive module you've purchased will have to mate to - http://www.ifixit.com/MacBook-Parts/MacBook-Optical-Drive-Cable/IF186-022