this is my first post on this forum. I have a new to me 2007 Argo. The canvas top is really saggy in the middle. It looks like it's missing a support. The top snaps onto the windshield then there is a frame that goes across at the back. Should there be another support holding up the middle of the top?

I'm not sure how to attach a photo yet in this forum so here is a link. I hope it works.
https://photos.app.goo.gl/kyidH6RdnUEBpqZf8

Also, what is the 6-in post sticking up on the front just behind the right headlight? It has a nylon strap with a snap on the end attached to it