Figure 4-4 and 4-5 show the bottom panels, but it's just to illustrate tracing the original panels and suggested sewing order, so it applies to all panels on all the seats.
It's a bit easier to sew the panels together first, and then run another line of stitching over top of it to sew the "dog bar" back on. I hope that makes sense
I only did the seat centers... all the black areas you see in the finished pictures is the original material. RedFrost did his differently in that he also replaced the forward-most panel on the seat bottoms.
Also, thanks for comments on the DIY.... knowing people appreciate it makes all the hours I put into it worthwhile!