Headliner Help!!

i have a 72 duster and recently purchased a 4 bow headliner from a member and it came with 6 bows. does anybody know what bows i should use. the bows are labeled 1-6 so i was thinking anout using 1-4 but the last bow which is number 6 is very long so im a bit confused.


also where do the bow clips go on a 72 duster

any tips, pics would help.

Thanks
416 mopar