This is a relatively easy procedure but
make take a novice some time to master it.
STEP 1 : Hold the end of the thread between your left hands thumb and forth finger and lay the thread over the top of the hook shank ie. The boobin furthest away from you. Now holding the thread taught bring the bobbin holder under the hook shank.
STEP 2 : For the next thread wrap wind the thread across the taught thread and over the hookshank again as shown and repeat a few times until the thread is well and truly secure.
STEP 3 : Snip the waste thread that you were holding in your left hand.
STEP 4 : Continue winding until the end of the remaining thread that has just been snipped is neatly covered.