I checked the transcript site. The dikornium cloud creature entered the ship through the radioactive disposal vent for impulse engine number 2.
http://www.chakoteya.net/StarTrek/47.htm
I am hesitant to say that the
Enterprise is in either shot. The first shot shows the rearmost portion of a nacelle. I compared the nacelle of this ship and the nacelle of the
Enterprise - they don't match. I think we are looking at a new ship here.
As for the second shot, this Federation starship doesn't have the shape of the
Enterprise.
As a fan of ships, I am hyped to see new ships.