Open Webs Editor
Navigate to the page where you'd like to add your Form Builder plugin.
Add HTML Code
At the bottom of the Webs editor are the various site components. Click Other to reveal the Custom HTML component. Then, drag the Custom HTML component to where you'd like your Form Builder plugin to appear on the page.
A gray Custom HTML box will appear on your page.
Double click the box to open the popup where we'll paste the HTML in the next step.
Paste this code into the gray box and save.
Note: Webs elements don't automatically change size. So, you may want to change the height of your HTML box. To do this, just change the height="600px" to a higher number.
Edit your Form Builder on Webs:
Go to your live Webs website and select the gear icon in the upper right corner of the Form Builder Plugin.