sail panel boards for 69 charger headliner

[Smithboys69]

OK I am confused about something regarding the sail panel boards on the C pillar interior for 69 chargers. I am currently installing my headliner and am kind of stuck. I have a nice fit up to the c pillars and believe I may have cut the material too short at the bottom to glue to the package tray correctly. I noticed they sell sail panel boards covered with the same type of material. What is the purpose for these vs just the uncovered? I know the uncovered go under the headliner. Are the covered ones optional to go over the liner or are they intended to go under also. I am just curious why they would be covered if going under the headliner anyway? Can anyone advise the difference and why? Any help would be greatly appreciated!

 

[davek]

Maybe this video will help you get an answer.

 

[Smithboys69]

Maybe this video will help you get an answer.

Thank you but this doesn’t help explain the separate covered sail boards.

 

[davek]

@Richard Cranium might know

 

[Richard Cranium]

The headliner gets glued to those cardboard pieces and also a couple inches onto the shelf panel.