Are you talking about the B pillar fabric cover that goes from just above plastic to ceiling?
There are push fasteners at top and a couple in between, it lifts off the plastic. The plastic tabs will break holding the fasteners especially at the top IIRC. I haven't been able to find new clips(they're some weird design) so I modified others to fit.
If can wait for a bit(morning probably) I'll try and find old one and take pic for you of the back(it's in barn loft and it's 101 out right now).