Have you googled that model? You might find out more info during a search.
http://www.sewusa.com/Threading_Diag...ng_diagram.htm
There are several links for manuals, etc. Above is one on how to thread it. Seems to be plenty of information available.
Not sure how it compares to the Singer 301 but they do make a Singer 1301 which I accidently discovered when I "binged". LOL