1. Attach the roof molding to the T stud at the A section.
2. Press in the roof molding along the direction (1) shown in the figure and attach it to the clip A at the B section.
3. Hook the roof molding to the clip B at the C section, press it in, and attach the roof molding to the clip B.
4. Press the roof molding along the direction (2) shown in the figure and attach it to the clip A at the B section.
5. Attach the roof molding to the T stud at the D section.