It appears that you are looking at the one line that is the fuel line, the vent lines are hidden behind it and likely don't have clamps? Have any other pics?

Here is my example, one clamp is missing because I just removed it and replaced the hose for a picture without the old clamp (you can see the indented area where the second clamp had been), the shield had never been off my car before I removed it for this pic, it was untouched with unbroken factory undercoating on all of the bolts that retained it. Also, none of the vent lines were KV hose, they were more generic looking with dimensions and other codes printed on them, they were so nice I cleaned and reused them.