Bj 42 lx rear seat attachment (1 Viewer)

[toy 4]

Hi all,i'm Nicola from Italy , I am a lover of the 4 series, I am finishing the restoration of a bj42 lx, purchased new by my father in 1983, I need the photo of the attachment on the floor of the single folding rear seat to rebuild it, I think it has been lost.
Thanks to anyone who can help me.