Is this the one?? If so you can probably figure it out from this picture.
Kathi

http://www.sewingonline.co.uk/machines/merrit/

Thanks kathi, not the one, tho. This machine is smaller than a featherweight - 10" in length and 8" in height and the thread holder sits down low on the bottom right side in the back.

Have your tried emailing their customer support? Maybe they can send you an instruction book. Colleen

I have the same problem. Someone gave me a Singer Merritt 212 with no thread holder attachment. I have looked for parts and a manual but not found them yet. My sister sent me this website.

http://www.sew4less.com/product_details.php?ProductID=926

Check our this web site as they have a manual listed that you can purchase for $14.95. There is a Singer store in my area so I am going to check them oput also and see if they can be of any help.

Try this website. It has threading diagrams. Colleen

Here is a link that might be useful: SewUSA