Singer 8768 Instruction Manual page 19

THREADING THE BOBBIN THREAD
NOTE: This is a very important step. The bobbin
must rotate counterclockwise when thread is pulled.
thread until it stops in the slot (B). Then pull the thread
cutter on the top left.
NOTE: Sewing can be started without picking up the
bobbin thread.
6
16
1
2
3
4
Cutter
5
Couteau
Cortador
Groove
Surco
B
A
A