Luckily, it is very accessible from inside the trunk.
There are 2 creases that made me think a stud welder and some tension would help.
Tell me how you would go at this... where would you start and how would you approach it?
My thought was to start at "1" by pulling toward the rear where I have marked "x" while tapping the ridge of the crease. Hopefully there's enough room for the stud welder to work...
