Your first step is to apply a sticker to the back (blue side) of your sensors.
Starting above the tab, gently push the backing of the stickers away from the sticker, then hook your finger over and around the tab, and catch the sticky part of the sticker. Carefully peel the sticker and backing from the white paper.
Note: If the white backing comes up but the clear sticker is still attached to the backing, lay the white backing back down. Peel it up again, being sure to use your nail or finger to coax the sticker up along with the white backing.
Align the flat end of the sticker with the flat end of the sensor (blue side), and smooth upward.
Peel off and discard the white backing when you are ready to apply the sensor to your back.