Roadster/convertible model.

Trying to help a neighbor lady with a burned out brake light, I was not able to remove the trunk's inside panel on the right. All the little push-pin fasteners came out, but that still left a steel post topside holding the liner. I assume this post and its twin on the other side are anchors for a cargo net or some such but I could not tell if it is screwed into the metal, bolted/nutted on the back side (which I cannot see or access), or how it is retained. Didn't want to force/mar it, nor did I want to damage the liner by trying to pull it out from underneath the post. Any help/advice would be appreciated.

I did get the bulb replaced but had to climb inside the trunk, contort my aging body into a position it still has not recovered from, reach over the loosened liner and--barely--get my hand far enough in there to change the bulb. Seemed to do the trick, but I'm still not sure the bulb is fully seated in the socket. If I could have fully removed the liner it would have been much easier.