SINGER 14T967DC-WORKBOOK QUANTUMLOCK - Manual (Page 174)

3. Thread the top cover thread guide by pulling the thread towards the left until
it slips under the guide. Then pull the thread along the right side of the button
as illustrated.
4. While holding the thread firmly, pull the thread between the tension disks.
5. Continue to thread points 4-8. Slip the thread into the middle slot of the
thread guide . Go over the take up lever . Continue by slipping the
thread into the middle slot of the thread guides and .
Five-Thread Safety Stitch Narrow page 15