Restringing a guitar - the bridge end - FAQ
hampshire guitar orchestra photo gallery
As you feed the string through in the direction of the red arrow, take the good end and pass it under the string.
In the photo, we've made a larger loop than we need, simply so you can see it more clearly.
If you are left handed, you might want to do the mirror image of this - indeed, if you look at the photo, the top strings (which we haven't replaced yet) are a mirror image of the knot we're about to tie.