The Face Laughs While The Brain Cries

I'm new to 3ds max as of today. I need to connect one side of this mesh to the other. How can I select vertices and create faces from them? Like this picture... Thanks for any and all help!

I tried your face hosted to unhosted method exactly as you showed in the video. When I place the family in a project, it still hosts to the level I place it on, and I can't move the family instance vertically. Is there another step to your process that makes this work? Attached is the pump family I tested this on.

The Face Laughs While The Brain Cries 2

The inner object is the one I'm trying to change. If I could scale the blue face smaller, I could get the effect I want. But whenever I try to scale the face, the whole object gets selected and scaled instead. The effect I'm going for is that of a shallow depression that isn't steep. I want the curve to extend further into the object.

The Face Laughs While The Brain Cries 3

Hello, I've been using the Split face tool (looking like a little tv screen) to add some differents materials to some part of the ceiling. Now i want to edit that shape because the project changed but i can't select that "Face Split" anymore. How can i acheive that ? Or how do i delete what i've cr...

The Face Laughs While The Brain Cries 4
I have a Face Hosted family instance, if i delete the Host parent Element, the face based family instance got , am trying to rehost to new host element face reference, is there any api to do that in revit, and i am using to create face family instance by doc.Create.NewFamilyInstance(...
The Face Laughs While The Brain Cries 5