Difficult to tell exactly from the photos, but I believe that metal supply line should be snapped into two supports under the central cover panel. The first is just ahead of the door and the second is under the fuel filter. It snaps into the plastic supports that also hold the two metal coolant lines.
__________________
2001 986 Boxster S 3.2 | Lapis Blue over Savanna Beige
2015 981 Cayman 2.7 | Dark Blue Metallic over Luxor Beige
2019 Macan S | White over Luxor Beige
|