When I filed my 2017 return, I didn’t know there was a home energy credit available for our new boiler. I completed a 1040X, what other documents do I need to send?

I have a certification statement from the boiler manufacturer as well as the receipt for the boiler. Do I need to send those with the 1040X or is that form sufficient. Also, do I need to include form 5695 (Residential Energy Credits) or is that not necessary?