Not the FL5 but I would think this will be the same as regular Civic.
Here is a picture of how I installed mine. I don't have step by step of how it was installed.
https://preview.redd.it/gvhph1na97f91.jpg?width=4032&format=pjpg&auto=webp&v=enabled&s=40c5be46ad173bb89cb71329569af0be72a0404f
I...