the way to bury the head is by starting 1/4″ or so from the end and push the hook pt into the tube then weave the tube onto the hook and stuff the head in- then the weedguard can stick out, the head is inside and you will have to make a second hole with the line tie. I am somewhat computer illiterate or i would draw you a picture.
Practice with old or torn tubes if you want, or rig them texposed and pinch the hook pt back into the plastic.