Drivers Side Back seat headliner Attachment Question

In the 2005 330Ci convertible with power top we just bought the headliner and top are in great shape except for the bottom left attachment point just by where a back seat passenger's shoulder would be on the driver's side. The fabric and attachment cord is loose there and I can't figure out how it should attach. The opposite side is perfect and so I can't and don't want to try to pull it out to see how the drivers side should be.

I have some pics and I think a plastic piece that is at the bottom of the headliner may be broken.

I don't want to take up forum space posting pics if there is someone who knows the proper way this all goes together then maybe I could pmail them to them.

It's not a big deal as would only be noticeable if someone was in the back seat but I'd like to fix it if I can.

Thanks for any advice. I'm posting two pictures so everyone can see what I am talking about but I have more pics as well. I think one of the plastic pieces is broken at the red X location but I can't be sure. Also the previous owner looks like he put some velcro tape in the 2nd pic. to hold it but the cord should be tighter i believe.

Any advice or diagrams or help would be most appreciated.
Thanks
Mike in Alabama

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Drivers Side Back seat headliner Attachment Question