Picture 1. Vertices have to be welded in locations marked with yellow circles.
Select 10 edges and create new polygons inside the ear by copying edges according to picture 1. Notice, that in three places (marked with yellow circles) vertices have to be welded by using Editable Poly's Target Weld.
Picture 2. New polygons inside the ear.
Select 11 edges and create new polygons by copying edges according to picture 2.
Picture 3. Fill the hole by creating new polygons according to the picture.
Finalize the inner part of the ear by creating new polygons according to picture 3. I count 15 new four sided polygons. Don't worry if you create more or less than 15 polygons. At this stage it's not that important how many polygons there are but how the ear looks like.
Picture 4. Vertices have to be welded in locations marked with yellow circles.
Select 14 edges and create new polygons by copying edges towards the head according to picture 4. Notice that in four places (marked with yellow circles) vertices have to be welded by using Editable Poly's Target Weld.
Picture 5. Create new polygons to the back of the ear.
Select 13 edges in the back of the ear and create new polygons by copying edges according to picture 5.
Page 9: Attaching the Ear to the Head in 3DS MAX