How to tell between A body B body carpet

468AF581-120D-4278-A59B-39F6102465B5.jpeg 76B96502-F889-480E-BC35-6B53E6753CA9.jpeg I bought a 69 GTS and a brand new carpet
came with it in a box. ACC from the old days
super great quality but it was marked in magic market b body 4 speed. I ended up
buying a new ACC carpet (piss poor quality)
so now I have this one. But no markings on box or carpet??