Closing an Open edge

Check this out if you will. I have bottle that I successfully cut using the Mesh Split tool. I tried to use the same tool on the cutting plane and it just would not cut it. It had in the past. I believe it is because of the bend in the middle. Any ideas on how to seal the edges with the arrows? The edge without the arrow I was able to seal.

FillMeshHole should cap that hole.