First snell the bottom hook.
1. Using a cut length of leader, pass enough tag through the eye from the front and lay down the shank on the back.
2. with the bend toward the palm of your hand pinch the shank and tag to hold them together.
3. Take the leader length and turn it tightly down the length of the shank about 6-7 times. (I always turn away from the cut joint of the eye).
4. Pass the leader through the eye from the back, taking care not to let kinks develop and no slack in the turns around the shank.
5. Pull the leader hard against the hook to 'set' the snell.
NB you can judge the turns and pinch the shank from the beginning where you will finish the turns. Ideally use a pattern of hook and match to a leader that will only just pass twice through the eye.
Snelling the send hook is exactly the same procedure........... but
This time you lay the leader along the back of the shank of the second hook as before, but ensuring that the distance between hook bends is exactly as desired and the hook bend is facing the opposite way on the leader to the first.
Snell and tighten as before with the leader exiting the eye to the front.
Trim bottom tag and tie to your swivel.
2-3 mins tops.