A motor vehicle seating assembly for a motor vehicle has upwardly extending seat back assembly comprising a seat back frame, a decorative seat back rear panel module, and a seat back cushion and suspension module attached to the seat back frame. The seat back cushion and suspension module further comprises a one-piece composite inner carrier substrate having a pair of vertically extending side members, an upper transverse member, and a lower transverse member having an outer perimeter. A plurality of attachment openings is disposed about the outer perimeter at discrete locations. A seat back trim cover has an outer perimeter having a plurality of seat back trim cover attachment fasteners disposed about a perimeter of the seat back trim cover at locations corresponding to the discrete locations of the outer perimeter of the one-piece composite inner carrier substrate.