AA data feed to S3.

I'm sending AA data feed to S3.
As follows.
17 columns send to a  S3.
but when there is no information of the last column it does not appear
the header of the column.

for example.

AA Data
A B C D
1 1 1
2 2 2

S3
A B C
1 1 1
2 2 2

I do not get the head of the column, what do I do so that I can get the head in S3?

Also you can add columns from when you send to S3?
I want to add as the photo.
I always have to add manually.

If anyone knows about this they can help me.