series 2 seat assembly

[trabant]

Hi I'm having the seats retrimmed for my series 2 these are the ones with the solid type back boards these need the edges restitched which isn't a problem but I cant work out how the back boards attach to the seat frame advice and or pictures would be useful.

[mike.perry]

Horizontal or vertical pleat seats?

[trabant]

Verticals not the MM type