How do I replace the untouchable vinyl siding lower than the roof (^)? I know how to replace vinyl siding, but there is a small...

I know how to replace vinyl siding, but there is a small piece under the (^) shaped roof and I don't know where on earth to nail it.
If you have a video explaining that, it would be nice.
Answers:    i assume u tight-fisted the last piece in the gable? the "A".when u cut the second piece most often u have cut the nail fin off .we use liquid nail and put it in the track and on the top of the piece and push it in to the J-channel ..

lic. gen. contractor