Add order number on the output paper?

I buyed Stamps.com Connector (Printing labels, shipping rates).

I want the order number to appear on the output paper.
How can I do that?

Can you explain what do you want?
Make print screen and send me it.
Stamp.com API has many parameters.
Can you write to stamps.com support and ask them about " the order number to appear on the output paper. "