SINGER 1507WC - Manual (Page 27)

When inserting or removing the bobbin, the needle must be
fully raised.
Attention:
Turn power switch to off ("O") before inserting or removing
the bobbin.
-Open the hinged cover (1).
-Hold the bobbin case with one hand. Insert the bobbin so that
the thread runs in a clockwise direction (arrow) (2).
-Pull the thread through the slit and under the finger (3).
-Hold the bobbin case by the hinged latch (4).
-Insert it into the shuttle (5).
20
GB Inserting the bobbin
1 2
3 4
5