the thread (with your foot in the up position) should go down through the slot on the right, (marked 2 in the pic)..
taken from right to left along the bottom,
then up again..
now you should pull your thread to the right..into that cutout...then left over the top of the thread take up lever..(the silver piece), and down again.
At this point, put your foot down and tug on the thread..it should give you resistance..that tells you the thread is in your tension discs properly. If it pulls through very easily, start over, keeping more tension on the thread as you thread the machine, always with your foot up.