Remember when I told you about the folded plastic coming in handy? This is the part. Because you've folded your plastic in half, you have now created a plastic burrito in which you can easily place the pool noodles, creating padding at the end of your slide so you don't go shooting off the end. I then stapled the open sides of the plastic sheet in order to keep the noodles snug.
Image Source: POPSUGAR Photogray / Taylon Faltas