I am no longer using RapidWeaver. I am using Elements.
I found HTML coding for Elements, yet, am unable to find where I input the HTML" https://codepen.io/fundocs/pen/ZERMzKo
I really wish that they would stick to the same names of icons, and their uses, no need to change the names, it just makes it more confusing.
Where is the DEMO to learn to add a DONATION INTO ELEMENTS?
As Steve mentioned, using a Custom Component is the best approach for your Donation Form.
I noticed your CodePen includes both JavaScript and CSS — the simplest way to include that in Elements is by using an @portal(headEnd) statement. This places your scripts and styles into the <head> of the page automatically.
Below that, just drop in your HTML as usual.
I’ve uploaded a sample project to Elements Cloud for you. You can use it as a starting point or copy the Custom Component into your own project.