Looks like I was wrong again. Sorry about that. The 201s vs the 66/99s and the 15-91s vs the older 15s and clones always throw me for a loop.
You're best bet would be to go to the Singer site and download yourself a manual.
{
http://www.singerco.com/accessories/instruction-manuals }
However for now here is a couple pics on how to load and thread the 201 bobbin:
Hope this helps some.
Joe