I don't know whether you have the side shift or the tail shifter but pelica parts has diagrams of both. Attached is a link that could help.
http://www.pelicanparts.com/914/914parts.htm
BTW, their bulletin board tech discussions are very, very good. I have a '74 914 and you can get a lot of info about anything you need. Pelican Parts also carries almost anything you need for your 914. I have the same call name on that bulletin board