Servis M306S-C, faulty timer

Question

I have a faulty timer unit - part number 516019901 and have ordered a replacement part but this has the part number 51609902 and looks completely different. It has alot less pins to attach cables to and no guidance as to which cable should be attached where. I understand that manufacturers upgrade parts but some help on how to fit it wouldn't go amiss. Can you advise?